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-10-15z+16z-12=1
-10-z=1/+10
-z=11/*(-1)
z=-11
4-2 (y+1)=-2
4-2y-2=-2
2-2y=-2/-2
-2y=-4/:(-2)
y=2
-2(x-3)-3(3x+5)=5
-2x+6-9x-15=5
-11x-9=5/+9
-11x=14/:(-11)
x=-14/11
2) x/3 [ułamek] - x/6 +2=-7,5
nie rozumiem tego ;/
3z - 47/5 + 1/3 = - 1 i 2/3 /*15
45z-141+5=-25
45z-136=-25/+136
45z=111/:45
z=111/45
3 i 1/2 = x+1 i 2/7 /*14
49=14x+18/-18
31=14x/:14
31/14=x
x + x/4 - 2 = 1 i 3/4x - 1/2/*4
4x+x-8=7-2
5x-8=5/+8
5x=13/:5
x=13/5