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3x-x-5=-1
2x=-1+5
2x=4/2
x=2
3*2-(2+5)=-1
2(x+1)-4x=-1
2x+2-4x=-1
-2x=1-2
-2x=-1/-2
x=1/2
2(1/2+1)-4*1/2=-1
2(x+1)+5x=16
2x+2+5x=16
7x=16-2
7x=14/7
x=2
-4x-3(2x+1)=7
-4x-6x-3=7
-10x=7+3
-10x=10/-10
x=-1