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12x+3\left(x-1\right)=18-2\left(2x-1\right)
Multiply both sides of the equation by 6, the least common multiple of 2,3.
12x+3x-3=18-2\left(2x-1\right)
Use the distributive property to multiply 3 by x-1.
15x-3=18-2\left(2x-1\right)
Combine 12x and 3x to get 15x.
15x-3=18-4x+2
Use the distributive property to multiply -2 by 2x-1.
15x-3=20-4x
Add 18 and 2 to get 20.
15x-3+4x=20
Add 4x to both sides.
19x-3=20
Combine 15x and 4x to get 19x.
19x=20+3
Add 3 to both sides.
19x=23
Add 20 and 3 to get 23.
x=\frac{23}{19}
Divide both sides by 19.