Question

Resolva a equação de 1° grau a seguir.

x+x-4=17-2x+1

Answer 1

$x+x-4=17-2x+1\to \\\\ 2x+2x=17+1+4\to \\\\ 4x=22\to \\\\ x= \dfrac{22}{4} \to \\\\ \large\boxed{x= \frac{11}{2} ~~ou~~x=5,5}$

Answer 2

R=
2x - 4 = 17 + (- 2) x + 1
2x - 4 = 18 + (-2) x
2x - 4 - (-2) x = 18 + (-2) x - (-2x)
4x - 4 = 18 + (-2) x + 2x
4x - 4 = 18
4x = 18 + 4
x = 22 / 4 ou 11 / 2 ou 5.5