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6\left(2x-1\right)+7\left(1-2x\right)=21\left(x-1\right)-2\left(18x+2\right)
Multiply both sides of the equation by 42, the least common multiple of 7,6,2,21.
12x-6+7\left(1-2x\right)=21\left(x-1\right)-2\left(18x+2\right)
Use the distributive property to multiply 6 by 2x-1.
12x-6+7-14x=21\left(x-1\right)-2\left(18x+2\right)
Use the distributive property to multiply 7 by 1-2x.
12x+1-14x=21\left(x-1\right)-2\left(18x+2\right)
Add -6 and 7 to get 1.
-2x+1=21\left(x-1\right)-2\left(18x+2\right)
Combine 12x and -14x to get -2x.
-2x+1=21x-21-2\left(18x+2\right)
Use the distributive property to multiply 21 by x-1.
-2x+1=21x-21-36x-4
Use the distributive property to multiply -2 by 18x+2.
-2x+1=-15x-21-4
Combine 21x and -36x to get -15x.
-2x+1=-15x-25
Subtract 4 from -21 to get -25.
-2x+1+15x=-25
Add 15x to both sides.
13x+1=-25
Combine -2x and 15x to get 13x.
13x=-25-1
Subtract 1 from both sides.
13x=-26
Subtract 1 from -25 to get -26.
x=\frac{-26}{13}
Divide both sides by 13.
x=-2
Divide -26 by 13 to get -2.