1)6|х|+3|х|=272)|12-|х+3||=33) |5х+1|=9

Question

1)6|х|+3|х|=27
2)|12-|х+3||=3
3) |5х+1|=9

Answer 1

1)6|х|+3|х|=27;
6x+3x=27;
9x=27;
x=27:9;
x=3.

2)|12-|х+3||=3;
12-x+3=3;
15-x=3;
x=15-3;
x=12.

3) |5х+1|=9;
5x+1=9;
5x=9-1;
5x=8;
x=8:5;
x=1,6.

Comments

Спасибо