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3x-1-7=2x+4-x
Combine 8x and -5x to get 3x.
3x-8=2x+4-x
Subtract 7 from -1 to get -8.
3x-8=x+4
Combine 2x and -x to get x.
3x-8-x=4
Subtract x from both sides.
2x-8=4
Combine 3x and -x to get 2x.
2x=4+8
Add 8 to both sides.
2x=12
Add 4 and 8 to get 12.
x=\frac{12}{2}
Divide both sides by 2.
x=6
Divide 12 by 2 to get 6.