Question

Resolva em R as equações a seguir 2x – 10 + 7x + 10 = 180

Answer 1

Oie, Td Bom?!

$2x - 10 + 7x + 10 = 180$

$2x + 7x = 180$

$9x = 180$

$x = \frac{180}{9}$

$\boxed {x = 20}$

Att. Makaveli1996

Answer 2

$\longrightarrow \sf2x - 10 + 7x + 10 = 180 \\ \sf2x + 7x = 180 + 10 - 10 \\ \sf9x = 180 + \cancel{10} - \cancel{10} \\ \sf9x \: \: = \: \: 180 \\ \sf x = 180/9 \\ \sf \red{x = 20}$

Att. C6bolinha.