1.(x-1)*2=x
2.x+(2x+4)=3
3.3-(x-4)=5
4.x-(2x+1)+3=7
5.2(x+4)-5=7
6.2x+3-(3x+2)=-1
7.(x+2)-5x=3
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1.(x-1)*2=x
2x-2=x
2x-x=2
x=2
2.x+(2x+4)=3
x+2x+4=3
3x=-1
x=-1/3
3.3-(x-4)=5
3-x+4=5
-x=5-7
-x=-2
x=2
4.x-(2x+1)+3=7
x-2x-1+3=7
-x=5
x=-5
5.2(x+4)-5=7
2x+8-5=7
2x=7-3
2x=4
x=2
6.2x+3-(3x+2)=-1
2x+3-3x-2=-1
-x=-1-1
-x=-2
x=2
7.(x+2)-5x=3
x+2-5x=3
-4x=1
x=-1/4