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3(2x+1)-4(x-1)=13
We simplify the equation to the form, which is simple to understand
3(2x+1)-4(x-1)=13
Reorder the terms in parentheses
+(+6x+3)-4*(x-1)=13
Remove unnecessary parentheses
+6x+3-4+*(+x-1+)=+13
Reorder the terms in parentheses
+6x+3+(-4x+4)=13
Remove unnecessary parentheses
+6x+3-4x+4=+13
We move all terms containing x to the left and all other terms to the right.
+6x-4x=+13-3-4
We simplify left and right side of the equation.
+2x=+6
We divide both sides of the equation by 2 to get x.
x=3
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