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2\left(2x+1\right)-\left(x+1\right)=72
Multiply both sides of the equation by 6, the least common multiple of 3,6.
4x+2-\left(x+1\right)=72
Use the distributive property to multiply 2 by 2x+1.
4x+2-x-1=72
To find the opposite of x+1, find the opposite of each term.
3x+2-1=72
Combine 4x and -x to get 3x.
3x+1=72
Subtract 1 from 2 to get 1.
3x=72-1
Subtract 1 from both sides.
3x=71
Subtract 1 from 72 to get 71.
x=\frac{71}{3}
Divide both sides by 3.