Любезные люди, помогите срочно надо решиь по 911-915, обязательно отблагодорю. Заранее...

911. 1) |x-4|=2
$\left \{ {{x-4=2} \atop {x-4=-2}} \right.$
   $\left \{ {{x=6} \atop {x=2}} \right.$
2) |y+5|=3
   $\left \{ {{y+5=3} \atop {y+5=-3}} \right.$
   $\left \{ {{y=-2} \atop {x=-8}} \right.$
3) |3+x|=1.5
   $\left \{ {{3+x=1.5} \atop {3+x=-1.5}} \right.$
   $\left \{ {{x=-1.5} \atop {x=-4.5}} \right.$
4) |7-y|=-2
y∈∅
5) |x+3|+4=9
|x+3|=9-4
|x+3|=5
   $\left \{ {{x+3=5} \atop {x+3=-5}} \right.$
   $\left \{ {{x=2} \atop {x=-8}} \right.$
6) |y-2|+8=5
|y-2|=5-8
|y-2|=-3
y∈∅
912. 1) |2x-5|=0
2x-5=0
x=2.5
2) |4x-3|=0
4x-3=0
x=0.75
3) |2-3x|=0
2-3x=0
x= $\frac{2}{3}$
4) |4-5x|=0
4-5x=0
x=0.8
5) |3x+1|+2 $^{3}$ =0
|3x+1|+8=8
|3x+1|=0
3x+1=0
x=- $\frac{1}{3}$
6) |9x+2|- $3^{3}$ =(-3)^{3}
|9x+2|-27=-27
|9x+2|=0
9x+2=0
x=- $\frac{2}{9}$
913. 1) 5|x|+3=7
5|x|=7-3
5|x|=4
|x|= $\frac{4}{5}$
x=± $\frac{4}{5}$
2) 1.7|x|+4.9=10
1.7|x|=10-4.9
1.7|x|=5.1

1.7x=5.1, x⩾0
1.7(-x)=5.1, x<0<br>
x=±3
3) 2.5|3y|=15

2.5*3y=15, 3y⩾0
2.5(-3)y=15, 3y<0<br>
y=±2
914. 1) |2x+14|=6
$\left \{ {{2x+14=6} \atop {2x+14=-6}} \right.$
$\left \{ {{x=-4} \atop {x-10}} \right.$
2) |9x-18|=27
$\left \{ {{9x-18=27} \atop {9x-18=-27}} \right.$
$\left \{ {{x=5} \atop {x=-1}} \right.$
3) |8x+12|=20
$\left \{ {{8x+12=20} \atop {8x+12=-20}} \right.$
$\left \{ {{x=1} \atop {x=-4}} \right.$
4) |15x-10|=5
$\left \{ {{15x-10=5} \atop {15x-10=-5}} \right.$
$\left \{ {{x=1} \atop {x= \frac{1}{3} }} \right.$
5) |9x+15|=6
   $\left \{ {{9x+15=6} \atop {9x+15=-6}} \right.$
   $\left \{ {{x=-1} \atop {x=- \frac{7}{3} }} \right.$
6) |8x-6|=14
$\left \{ {{8x-6=14} \atop {8x-6=-14}} \right.$
$\left \{ {{x=2.5} \atop {x=-1}} \right.$