If x equals 4 and y 7 then 5x plus 5y equals?

Answer 1

Ill answer but also explain how this works.

So the problem is set up like this

X=4

Y=7

Find

5x+5y=?

So the first thing you do is plug it in

5(4)+5(7)

Now that you have this you multiply, SIDE NOTE -Do you know PEMDAS? If not, learn it rapidly. PEMDAS is the order of operations, it goes Parenthesis's, Exponent, Multiplication and division, addition and subtraction, the "And's" are the portions where you can switch up the order, and move just left to right. I often use the little saying: Please Excuse My Dear Aunt Sally, or PEMDAS.-

OKAY, so now multiplication

Lets break it down following the rules of PEMDAS,

Sooo... Multiplication! that's first

5(4) AND 5(7), these are two separate things, don't put them together quite yet.

So 5(4)= 20

and 5(7)= 35

NOW plug those back into your equation

20+35=X

Now simply Add!

55=X!

hope this helped :)