Question

1-resolva as equações do 1° grau
a)x-100=-2x+20

b)10x+4x=28

c)2x-100°=x+30°

d2x+40°=180°

Answer 1

a)x-100=-2x+20

x+2x = 20+100

3x = 120

x = 120/3

x = 40

b)10x+4x=28

14x = 28

x = 28/14

x = 2

c)2x-100°=x+30°

2x-x = 30°+100°

x = 130°

d2x+40°=180°

2x = 180°-40°

2x = 140°

x = 140°/2

x = 70°

Espero ter ajudado

31/05/22