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3\left(3x-1\right)-18=6+2\times 2\left(x+2\right)
Multiply both sides of the equation by 6, the least common multiple of 2,3.
9x-3-18=6+2\times 2\left(x+2\right)
Use the distributive property to multiply 3 by 3x-1.
9x-21=6+2\times 2\left(x+2\right)
Subtract 18 from -3 to get -21.
9x-21=6+4\left(x+2\right)
Multiply 2 and 2 to get 4.
9x-21=6+4x+8
Use the distributive property to multiply 4 by x+2.
9x-21=14+4x
Add 6 and 8 to get 14.
9x-21-4x=14
Subtract 4x from both sides.
5x-21=14
Combine 9x and -4x to get 5x.
5x=14+21
Add 21 to both sides.
5x=35
Add 14 and 21 to get 35.
x=\frac{35}{5}
Divide both sides by 5.
x=7
Divide 35 by 5 to get 7.