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9(13x-x)-4x=5(21-2x)+9x
We simplify the equation to the form, which is simple to understand
9(13x-x)-4x=5(21-2x)+9x
Reorder the terms in parentheses
+(+108x)-4x=5*(21-2x)+9x
Remove unnecessary parentheses
+108x-4x=+5+*(+21-2x+)+9x
Reorder the terms in parentheses
+108x-4x=+(+105-10x)+9x
Remove unnecessary parentheses
+108x-4x=+105-10x+9x
We move all terms containing x to the left and all other terms to the right.
+108x-4x+10x-9x=+105
We simplify left and right side of the equation.
+105x=+105
We divide both sides of the equation by 105 to get x.
x=1
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