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3\left(2x+1\right)=2\left(10x+1\right)-4\left(2x-1\right)
Multiply both sides of the equation by 12, the least common multiple of 4,6,3.
6x+3=2\left(10x+1\right)-4\left(2x-1\right)
Use the distributive property to multiply 3 by 2x+1.
6x+3=20x+2-4\left(2x-1\right)
Use the distributive property to multiply 2 by 10x+1.
6x+3=20x+2-8x+4
Use the distributive property to multiply -4 by 2x-1.
6x+3=12x+2+4
Combine 20x and -8x to get 12x.
6x+3=12x+6
Add 2 and 4 to get 6.
6x+3-12x=6
Subtract 12x from both sides.
-6x+3=6
Combine 6x and -12x to get -6x.
-6x=6-3
Subtract 3 from both sides.
-6x=3
Subtract 3 from 6 to get 3.
x=\frac{3}{-6}
Divide both sides by -6.
x=-\frac{1}{2}
Reduce the fraction \frac{3}{-6} to lowest terms by extracting and canceling out 3.