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13x+4(x+9)=104
We simplify the equation to the form, which is simple to understand
13x+4(x+9)=104
Reorder the terms in parentheses
13x+(+4x+36)=104
Remove unnecessary parentheses
+13x+4x+36=+104
We move all terms containing x to the left and all other terms to the right.
+13x+4x=+104-36
We simplify left and right side of the equation.
+17x=+68
We divide both sides of the equation by 17 to get x.
x=4
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