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2x-30=2
2x=2+30/:2
x=16
4(x+½)=10,5
4x+2=10,5
4x=10,5-2
4x=8,5/:4
x=2,125
-4x=2x-3
-4x-2x=-3
-8x=-3/:(-8)
x=0,375
-5=3x-4
-3x=-4+5
-3x=1/:(-3)
x=-1/3
2x-30=2
2x=30+2
2x=32 /2
x=16
4(x+0,5)=10,5
4x+2=10,5
4x=-2+10,5
4x=8,5 /4
x=2,25
-4x=2x-3
-4-2x=-3
-6x=-3 /-6
x=0,5
-5=3x-4
-3x=5-4
-3x=1 /-3
x=1/3