Question

Resolva

a) 5x+3+2x+1
b)8x+7.x=4x+2
c) 3x/2=1=5/3

Answer 1

a) 5x+3+2x+1
7x + 4 =0
7x = -4
x = -4/7

b)8x+7.x=4x+2
8x + 7x - 4x = 2
11x = 2
x = 2/11

c) 3x/2=1=5/3
tem dois sinais de igualdade ?