Question

A) 5x - 40 = 2 - x
B) 20 + 6 x = 2x +26
C)3,5 X + 1 = 3 + 3,1x

Answer 1

Explicação passo-a-passo:

$a)5x - 40 = 2 - x \\ 5x + x = 2 + 40 \\ 6x = 42 \\ x = \frac{42}{6} \\ x = 7 \\ \\ b)20 + 6x = 2x + 26 \\ 6x - 2x = 26 - 20 \\ 4x = 6 \\ x = \frac{6}{4} \\ x = 1.5 \\ \\ c)3.5x + 1 = 3 + 3.1 x \\ 3.5x - 3.1x = 3 - 1 \\ 0.4x = 2 \\ x = \frac{2}{0.4} \\ x = 5$