Question

решение уравнения (x-7)+x=33

Answer 1

(х-7)+х=33
х-7+х=33
2х-7=33
2х=33+7
2х=40
х=20

Answer 2

x+(x-7) =33
2x -7 = 33
2x = 33+7
2x = 40|:2
x = 20