Question

1) |x|+4=7 2) 2|x+6|=30 3) |x|-8=3 4) |4x-7|+6=11 прошу по быстрей

Answer 1

1) |х|+4=7
|х|=7-4
|х|=3
х=3
х=-3
2) 2|х+6|=30
|х+6|=15
х+6=15
х+6=-15
х=9
х=-21
3) |х|-8=3
|х|=3+8
|х|=11
х=11
х=-11
4) |4х-7|+6=11
|4х-7|=5
4х-7=5
х=3
х=1/2