answersLogoWhite

0


Best Answer

X = 1st number

Y = 2nd number

Facts given:

X = 2Y (One number is equal to 2 times the second number)

2X + 2Y = 20 (2 times the 1st number, plus 2 times the 2nd number is 20)

Now we can easily find X and Y.

We'll use a method called substitution to help us.

Our first equation: X = 2Y is already solved for X. (it equals 2Y's!)

So let's substitute x = 2y into the 2nd equation and find out what y is. Remember to use parenthesis!

2x + 2y = 20

2(2y) + 2y = 20

4y + 2y = 20

6y = 20

y = 20/6

y = 10/3

We found a number for Y, even though it is a fraction.

Let's substitute it back into our 1st equation to figure out what x is.

x = 2y

x = 2(10/3)

x = 20/3

In order to check and see if x = 20/3 and y = 10/3, substitute both x and y into either equation. You pick!

2x + 2y = 20

2(20/3) + 2(10/3) = 20

40/3 + 20/3 = 20

60/3 = 20

20 = 20 (check)

User Avatar

Wiki User

14y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: One number is equal to two times a second number two times the first number plus two times the second number is twenty if you let x stand for the first number and y for the second what are the two num?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Continue Learning about Trigonometry

Which equation can be used to find two numbers such that twice the first equals three times the second and three times their difference exceeds twice the second by 13?

Let the two numbers be x and y, then:Twice the first equals three times the second: 2x = 3yThree times their difference exceeds the second by 13: 3(x - y) = y + 13From equation (1) it is clear the first number (x) is greater than the second (y), so their difference is x - y.Equation (2) can be rearranged:3(x - y) = y + 13→ 3x - 3y = y + 13→ 3x = 4y + 13This gives two simultaneous equations:2x - 3y = 03x - 4y = 13which can then be solved to find the two numbers (x and y).


Does a flag pole have two pulleys?

Yes you can fly two flags on one pole all you have to do is make two knots each to the length of your flags and tie them to it or if you have clips on your pole clip the first flag to the top clip then clip your second flag to the bottom of the first one then place clip number 2 to the end of the 2nd flag then let it be chur


Is 12 a trianguler number?

Triangular number: An integer of the form (1/2)n(n + 1), where n is a positive integer.12 is not a triangular number. The first few triangular numbers are 1, 3, 6, 10, and 15.


An angle measures 152 and deg less than the measure of a supplementary angle. What is the measure of each angle?

The first angle is 166 deg and the second is 14 deg.


You slept with 2 different guys 1 month apart both at expected time of ovulation Neither went in you you had your period after the first guy but missed it after sex with the second guy Whose is it?

Only a paternity test can really tell.

Related questions

What is twenty five to one?

a ratio meaning the first number is twenty five times greater then the second


Two numbers that's do not equal each other but the first number squared equals the first number and the second numbered squared equals the first number and they do not equal zero or one what is number?

"First number squared equals the first number". This must be 1, but "they do not equal zero or one". No solution possible.


What is less than -5 but equal to -5?

0


What is the value of the digit 2 in the number 23.02?

The first 2 is twenty The second 2 is two hundredths.


XXVII is a roman numeral for which number?

Twenty seven. "X" is equal to 10, "V" equal to 5 and "I" equal to 1. Roman numerals are written with the largest numbers first then second largest and so on and so forth, so the number "XXVII" is read: Ten, Ten, Five, One, One, which, when added equals 27.


What is the result of dividing one number by another?

The resulting number will fit into the first number a number of times equal to the second number.


In subtraction 2 negatives equal what?

if the first negative is samller than the second its positive but if the first one is a larger number than the second then its a positive


How do you know if two matrices can actually be multiplied?

The number of columns in the first matrix must equal the number of rows in the second.


How write twenty nine hundredths in standurd form?

.29 The first number after the dot is the tenths position and the second after that is the hundredths position.


How do you spell out 25th?

The ordinal number 21st is written out "twenty-first."twenty-first


which 2 digit number is equal to the sum of its first digit plus the square of its second digit?

89


What decimal is equal to twenty twenty fifths?

The decimal that is equal to 20/25 is 0.80 or 0.8 (they are the same thing) because you first can convert the fraction to a number that is over a 1 followed by 0's and work from there, or simply divide in this case 20 by 25. The numerator (number on top) is divided by the denominator (number on the bottom)) to get the decimal it represents. :)