Question

Resolva : 7 ( x – 20 ) + 20 = 2 ( x + 20 ) *

2 pontos

x = 22

x = 11

x = 33

x = 32



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Answer 1

$7(x-20)+20=2(x+20)\\7x-140+20=2x+40\\5x=160\\x=160/5\\x=32$

Answer 2

Resposta:

x = 32

Explicação passo-a-passo:

$7( \times - 20) + 20 = 2(x + 20) \\ 7x - 140 + 20 = 2x + 40 \\ 7x - 2x = 40 + 140 - 20 \\ 5x = 180 - 20 \\ 5x = 160 \\ \\ x = \frac{160}{5} \\ \\ x = 32$