10(x+2)-5(x-2) = 70?​

Resposta :

10(x + 2) - 5(x - 2) = 70

10x + 20 - 5x + 10 = 70

5x + 30 = 70

5x = 70 - 30

5x = 40

x = 40/5

x = 8

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