Question

74 = 53 - 7x

Answer 1

what do you get if you subtract the 53 from both sides

Answer 2

After that you divide it by -7
what do you get

Answer 3

74 = 53 - 7x
-53 -53
21 = -7x
/-7 /-7
-3 = x
Tadah.

Answer 4

it does -(-21) is the same as 21 so you add it to 53 instead of subtracting it