Respuesta :

1. 5-7-8=-10
2.-5-7-8=-20
3.5-7-8=-10
4.5-7+-8=-10
lulukins
Replace each variable with the correct number.

A-B-C = 5-(-7)-(-8) = 5+7+8 = 20
(The two negatives turn to positives)

-A+B-C = -(5)+(-7)-(-8) = -5-7+8 = -4

A+B+C = 5+(-7)+(-8) = 5-7-8 = -10

A-B+C = 5-(-7)+(-8) = 5+7-8 = 4

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