Question

resolva as equaçoes....a)4x-20=-x+50.............b) 7x-30=x+90

Answer 1

x = 70/ 5
a) 4x - 20 = - x + 50
4x + x = + 50 + 20
5x  = 70
x = 70/5
x = 14
b) 7x - 30 = x + 90
7x - x = 90 + 30
6x = 120
x = 120/6
x = 20

Answer 2

Oi,

Resolução

a) 4x - 20 = - x + 50
4x + x = 50 + 20
5x = 70
x = 70/5
x = 14

b) 7x-30=x+90
7x - x = 90 + 30
6x = 120
x = 120/6
x = 20

Espero ter ajudado e bons estudos !