6 = w - 56 / -7
w = 14
Just to confirm, I’m reading the right side as a fraction with w - 56 as the numerator and -7 as the denominator.
Multiply both sides by -7:
- 42 = w - 56
Add 56 to both sides:
14 = w
Substitute back in to check:
6 = 14 - 56 / -7
6 = -42 / -7
6 = 6 :)