Question

resolva: 5 (3-x) - (7-x)> ou =4-(x-1)

Answer 1

5(3-x)-(7-x) => 4- (x-1)
15-5x- 7-x => 4- (x-1)
15-12x=> 4-x-1
15-12x=> 4-1-x
15-12x=>3-x
-12x+x=> 3-15
-11x => 12               (-)
11x=>-12
x=>-12/11

Creio que fique dessa forma.. espero ter te ajudado.