Question

Calcule o valor de x: 10 - 2x = 30 - 6x

Answer 1

ola, boa noite.

10-2x = 30-6x
10 - 30 = -6x + 2x
-20 = -4x
x = 20/4

x = 5


concluímos que o x vale 20.

Answer 2

-2x + 6x = 30 -10
4x = 20
20/4 = 5
x=5