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-5x - 2x = 77 - 7
-7x = 70
x = 70/-7
x = -10
2x + 8 = ...
=2.-10 + 8
=-20 + 8
=-12
- 5x - 2x = 77 - 7
- 7x = 70
x = -10
2x + 8
2.-10 + 8
-20 + 8
- 12