Respuesta :

Xaxarolus

Start by simplifying both sides.

-13 + 76 = -(-7b + 6)
Distribute the -1.
-13 + 76 = -1(-7b) + -1(6)
-13 + 76 = 7b - 6
63 = 7b - 6
Isolate the variable b.
63 + 6 = 7b - 6 + 6
69 = 7b
69/7 = 7b/7
9.86 = b
b = 9.86

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