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-x=8-2
-x=6 /:(-1)
x=-6
-x+5=-2
-x=-2-5
-x=-7 /:(-1)
x=7
-2-7=11
-2x=11+7
-2x=18 /:(-2)
x=-9
-5x+3=-12
-5x=-12-3
-5x=-15 /:(-5)
x=3
-1,5x+2=9,5
-1,5x=9,5-2
-1,5x=7,5 /:(-1.5)
x=5
2(x+3)=10 /:2
x+3=5
x=5-3
x=2
3(x-1)+2=8
3x-3=8-2
3x=6+3
3x=9 /:3
x=3
2(13-x)-9=1
26-2x-9=1
-2x=1-17
-2x=-16 /: (-2)
x=8
3(1-x)+2=-7
3-3x+2=-7
-3x=-7-5
-3x=-12 /:(-3)
x=4