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2\left(x+1\right)-6=18+3-x
Multiply both sides of the equation by 6, the least common multiple of 3,6.
2x+2-6=18+3-x
Use the distributive property to multiply 2 by x+1.
2x-4=18+3-x
Subtract 6 from 2 to get -4.
2x-4=21-x
Add 18 and 3 to get 21.
2x-4+x=21
Add x to both sides.
3x-4=21
Combine 2x and x to get 3x.
3x=21+4
Add 4 to both sides.
3x=25
Add 21 and 4 to get 25.
x=\frac{25}{3}
Divide both sides by 3.