Question

Resolva em R as equações a seguir 2x + 5 + x + 7 = 18

Answer 1

Oie, Td Bom?!

$2x + 5 + x + 7 = 18$

$3x + 5 + 7 = 18$

$3x + 12 = 18$

$3x = 18 - 12$

$3x = 6$

$x = \frac{6}{3}$

$\boxed {x = 2}$

Att. Makaveli1996

Answer 2

$\sf \Rightarrow2x + 5 + x + 7 = 18 \\ \sf2x + x = 18 - 5 - 7 \\ \sf3x = 18 - 5 - 7 \\ \sf3x = 18 - 12 \\ \sf \: 3x \: \: \: = \: \: \:6 \\ \sf x = 6/3 \\ \sf \red{x = 2}$

Att. C6bolinha.