This is the math problem that i need with 15: 3=x: 5

x =25

Step-by-step explanation:

Set it up like this

15/3 = x/5            You could cancel or you could cross multiply. We'll do both.

Cancel

15/3  = 5

5 = x/5                 Multiply both sides by 5

5*5 = x                 Combine

25 = x

Cross Multiply

15/3 = x/5             Cross multiply

15 * 5 = 3 * x         Combine the left

75 = 3x                  Divide both sides  by 3

75/3 = 3x/3           Do the division

25 = x                    Answer              

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.