Resposta :

(3x+2)/5 - (3x+1)/4 = 2

mmc (5 e 4) = 20

20:5.(3x+2) - 20:4.(3x+1) = 20:1.2

4(3x+2) - 5(3x+1) = 20.2

12x + 2 - 15x - 5 = 40

12x - 15x = 40 - 2 + 5

-3x = 43 .(-1)

3x = -43

x = -43/3

Outras perguntas