Question

Solve x – 4 = –7.
A.
x = 3
B.
x = –3
C.
x = 11
D.
x = –11

Answer 1

Hey, what you want to do here is add 4 on both sides, why? Because you want to isolate x as it asks, so to do that you want to get rid of the -4 on the left side, by doing it's opposite to cancel it out.

\[x-4+4=-7+4\]

\[x= -7+4 \implies -3\]