Question

5(1-x)+3(x+2) menor quex-4

Answer 1

5.(1-x)+3.(x+2)<x-4;  faz a distributiva(chuveirinho)
5-5x+3x+6<x-4
-2x+11<x-4
-2x-x<-4-11
-3x<-15   (multiplica por -1 e inverte o sinal)
3x>15
x>15/3
x>5

Answer 2

5(1-x) + 3(x+2) < x - 4; 5 - 5x +3x +6< x-4; - 2x + 11 < x - 4; - 2x - x < -4-11; -3x < - 15 (-1); 3x > 15; x > 15/3; x > 5; Resp.: {x E R/ x > 5}