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7x+3(5-2x)=13
We simplify the equation to the form, which is simple to understand
7x+3(5-2x)=13
Reorder the terms in parentheses
7x+(+15-6x)=13
Remove unnecessary parentheses
+7x+15-6x=+13
We move all terms containing x to the left and all other terms to the right.
+7x-6x=+13-15
We simplify left and right side of the equation.
+1x=-2
We divide both sides of the equation by 1 to get x.
x=-2
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