Best Answer

3 and the solution is x = -5 and y = -3

When subtracting the equations remember that a - - is equal to a +

So: - 6x - - 6x = 0

Also remember that a minus times a minus that the product is always a plus.

User Avatar

Wiki User

โˆ™ 2010-03-04 15:27:26
This answer is:
User Avatar
Study guides
See all Study Guides
Create a Study Guide

Add your answer:

Earn +20 pts
Q: By what number should you multiply the first equation to solve using elimintation -2x-4y equals 22 -6x plus 3y equals 21?
Write your answer...
Related questions

What is the number that you would multiply one or both of the equations -4 equals 5y equals 6 -6x-y equals 8?

There is no need. The first equation can be rearranged to a simple equation in just y. Multiply it by 0.2 to solve for y. Substitute the value of y in the second equation and rearrange to get a simple equation in x. Multiply by (1/6) to find x.

To multiply a number by itsself?

When you multiply a number by itself it equals the number in question to the power of two. For example, 4x4=16, but 4^2 also equals 16.

What number times what number equals 11 when you add it and equals -60 when you multiply it?

15 and -4

Is the number sentence 8 plus 2 equals 10 an expression or an equation?

That word "equals" in there makes it an equation.

80 percent of what number equals 40?

For the equation 80% of what number equals 40, the unknown number is 50.

What is the factor of the number?

Factors are the numbers you multiply together. For example, in the equation 2 times 3 equals 6, the 2 and the 3 are both factors of 6.

What does ce equal?

it equals the same number you multiply it by

Does a positive number multiply a positive number equals a negative number or a positive number?

(+)(+)=(+) (-)(-)=(+) (-)(+)=(-) (+)(-)=(-) This is all.

What is the property that you can subtract the same number from both sides of an equation the new equation will have the same solution?

The property is: If equals are subtracted from equals, the results are equal.

What is the equation to this number 63 divided equals 7?


If the number of atoms of each element in the products equals the number of atoms of each element in the reactants the equation is?

In this case, the equation is balanced.

What does n mean in the equation I equals Anev?

Number density.

What is 25 percent of equals?

To determine what 25 percent of a number is, multiply the number by 0.25

How can 5 5 5 5 equals 56?

you multiply each number by number

9 plus 3 equals 722 5 plus 7 equals 536 6 plus 8 equals 847 7 plus 2 equals what ans will come?

Answer is 411 Logic: You multiply the two numbers in LHS of the equation and reverse the result to form the first two digits of RHS and for the 3rd digit you subtract one from the 2nd number on the LHS of the equation.

What is the type of equation in which the numbers of each of the reactants atoms equals the number of product atoms?

A "balanced" equation.

What number equals 150 but also equals 32?

4800 you can just multiply 150x32

What number's can multiply that equals 21?

1x21 7x3

What is the equation of a number 2 equals to 8?

3x+2 = 8

How do you find the composition of a precipitate?

first you need to know the number of liters and moles and the equation. you do someting then multiply the liters times the moles. first you need to know the number of liters and moles and the equation. you do someting then multiply the liters times the moles.

How to write y equals 3x -1 as a decimal?


Why is -1 X -1 equals plus 1?

Any time that a negative number is being multipled by another negative number, it equals a positive number. In this case, -1 multiplied by -1 equals 1. Another example of this is -5 multiplied by -5 which equals 25. Though if you multiply a negative by a positve, it equals a negative. If you were to multiply a positive by a positve, it will always equal a positve.

How do you convert Inches to centemeters?

1 inch equals 2.54 centimeters, so multiply the number of inches by 2.54. 1 centimeter equals about .39 inches, so multiply the number of centimeters by .39.

How do you find the percent of a number when the percent and number both ends with a zero?

Given 20 and 50%, multiply 20 by 0.5, which equals 10. Given 70 and 30%, multiply 70 by 0.3, which equals 21. Or if you prefer, given 20 and 50%, multiply 2 by 5, which equals 10. Or if you prefer, given 70 and 30%, multiply 7 by 3, which equals 21.

How do you multiply a whole number by a negative number?

positivetimes negative equals negative neg. times neg. equals pos. pos.pos. equals pos.