Question

Como calcular 2 x + 18 = 38?

Answer 1

2x + 18 = 38
2x = 38 - 18
2x = 20
x = 20 / 2
x = 10

Answer 2

Olá Rafafre!

2x + 18 = 38
2x = 38 - 18
2x = 20
x = 20/2
x = 10

Prova real:

2x + 18 = 38
2 . ( 10 ) + 18 = 38
20 + 18 = 38
38 = 38