Question

-5x + 7 42

Answer 1

what do you need

Answer 2

I'm assuming that's supposed to be \(-5x + 7 = 42\) and you're trying to solve for x.

You need to get x by itself. So the first step is to subtract 7. Remember that you have to do the same thing to both sides:
\[-5x + 7 - 7 = 42 - 7\]

Answer 3

-5x+7=42
-5x=42-7
-5x=35
-5x/-5=35/-5
x=-7

Answer 4

-5x+7=42
(-5x+7)-7= 42-7
-5x= 35
-5x/-5= 35/-5
x= -7