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10+ 4(1-x)= 2x-6
10+4-4x=2x-6
-4x-2x=-6-10-4
-6x=-20/:(-6)
x=20/6
x=3 2/6
x=3 1/3
2)
20+5(2-x)=3x-2
20+10-5x=3x-2
-5x-3x=-2-20-10
-8x=-32/:(-8)
x=4
3)
x-2/4=2/*4
x-2=8
x=8+2
x=10
4)
x-5/2=4 /*2
x-5=8
x=8+5
x=13
5) x/15=4/3
3x=15*4
3x=30/:3
x=10
6)
x/25=4/5
5x=25*4
5x=100/:5
x=20
7)
-3x+1=-2(x-3)-3
-3x+1=-2x+6-3
-3x+2x=6-3-1
-x=2/*(-1)
x= -2