Question

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a)9x – 7 = 5x + 13 b)21 + 9x = 15x + 33

Answer 1

Resposta:

A=5

B=-2

Explicação passo-a-passo:A)

9x-7=5x+13

9x-5x=13+7

4x=20

×=20/4

×=5

B)

21+9x=15x+33

9x-15x=33-21

-6x=12 .(-1

6x=-12

X=-12/6

X=-2