Question

Alguém me ajudaaaaawaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

Answer 1

Resposta:

a)5x+x=90

6x=90

x=90/6

x=15°

b)x+18+x=90

2x+18=90

2x=90-18

2x=72

x=72/2

x=36°

c)2x+x-15=90

3x-15=90

3x=90-15

3x=75

x=75/3

x=25°

d)x+10+x=90

2x+10=90

2x=90-10

2x=80

x=80/2

x=40°