Решите уравнение 2|х|+3|х|-18=|х|-7|х|+15

Question

Решите уравнение 2|х|+3|х|-18=|х|-7|х|+15

Answer 1

5|x| + 6|x| = 15 + 18
11|x| = 23
|x| = 23/11

x = -2 1/11 и x = 2 1/11

Answer 2

[x] (2+3) -18= [x] (1-7) +15
5[x] -18= -6 [x] +15
11[x]=33
[x]=3
х=3 и х=-3