Question

Em cada item,determine o valor de X.

Answer 1

a)
x+x+10=90
2x=90-10
2x=80
x=80/2
x=40 

x=40+10
x=50
Resposta: 40° e 50°

b)
2x+50+3x=180
2x+3x=180-50
5x=130
x=130/5
x=26

x=2*26
x=52

x=3*26
x=78
Resposta: 52° e 78°