Respuesta :

-40 + 10a = -70

Add 40 to both sides:

10a = -30

Divide both sides by 10:

A = -3

Answer:

a = -3

Step-by-step explanation:

-40+10a = -70

Add 40 to each side

-40+40+10a = -70+40

10a = -30

Divide each side by 10

10a/10 = -30/10

a = -3

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