Question

5. Решите уравнение:
1) │х│=7; 2) │х│= –4; 3) │–х│=8,4.

Answer 1

$|x|=7, \ left [ {{x=7,} atop {-x=7;}} right. left [ {{x=7,} atop {x=-7.}} right. \ \ |x|=-4, \ -4 textless 0, |x|geq0, \ xinvarnothing. \ \ |-x|=8,4, \ left [ {{-x=8,4,} atop {-(-x)=8,4;}} right. left [ {{x=-8,4,} atop {x=8,4.}} right.$

Answer 2

нет решений