Question

calcular o valor do X

Answer 1

1.

a)180-80

x=100graus

b)90+30=120

180-120=

x=60 graus

2.

5x+4x+3x=180

12x=180

180/12=x

15 graus=x

b)90+5x=180

180-90=-5x

-90=-5x(×-1)

90/5=x

x=18 graus

3.

a)10x+50=180

10x=180-50

10x=130

x=130/10

x=13 graus

b)5x+55=180

5x=180-55

5x=125

x=125/5

x=25 graus

Espero ter ajudado