Question

Can someone solve -15 = - 7a - 4 - 4a

and m - 4m = -6

and 8v - 3 + 3v = 8

STEP BY STEP PLEASE.

Answer 1

A=1, m=2, v=1

Explanation:

A.

`-15=-7a-4-4a\\\\-15+4=-11a-4+4\\\\-11=-11a\\\\a=1`

B.

`m-4m=-6\\\\\\-3m=-6\\\\\\3m=6\\\\m=2`

C.

`8v-3+3v=8\\\\11v-3=8\\\\11v-3+3=8+3\\\\11v=11\\\\v=1`

For A, I first subtracted -4 from -7 as their variables are the same. I cannot subtract integers from variables. Then, I added 4 on both sides to move the integer on the left side. (This would also remove the -4 on the right side because -4+4=0) Then I divided -11 by both sides to get 1a or a.

For B, I subtracted -4 from 1 as their variables are the same. This time, since they are both negative numbers, I can make them both positive. So, just divide 3 by both sides as we want to get 1m.

For C, Add 3 to 8 as v is their variable. Then, I added 3 to both sides because we want to get the variable on one side. Divide by 11 and you will get v=1.