Question

|x|=10

|3x|=7

|2x-5|=7

помогите пожалуйста 

Answer 1

$|x|=10 \ x=pm 10$

$|3x|=7 \ 3x=pm7 \ x=pm frac{7}{3}$

$|2x-5|=7 \ left { {{2x-5=7} atop {2x-5=-7}} right. \ left { {{2x=12} atop {2x=-2}} right. \ left { {{x=6} atop {x=-1}} right.$