Question

4|x|-7=2lxl+5 И I4x-7I=2 решите

Answer 1

$4|x|-7=2|x|+5, \ 2|x|=12, \ |x|=6, \ left [ {{x=-6,} atop {x=6;}} right.$

$|4x-7|=2, \ left [ {{4x-7=-2,} atop {4x-7=2;}} right. left [ {{4x=5,} atop {4x=9;}} right. left [ {{x=1,25,} atop {x=2,25.}} right.$

Answer 2

если система, то решений нет