Respuesta :

38 + ( 8m + 4 ) = 90

Subtract both sides 38

38 - 38 + ( 8m + 4 ) = 90 - 38

8m + 4 = 52

Subtract both sides 4

8m + 4 - 4 = 52 - 4

8m = 48

Divide both sides by 8

8m ÷ 8 = 48 ÷ 8

m = 6