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5+3(x+4)+7x=0
We simplify the equation to the form, which is simple to understand
5+3(x+4)+7x=0
Reorder the terms in parentheses
5+(+3x+12)+7x=0
Remove unnecessary parentheses
+5+3x+12+7x=0
We move all terms containing x to the left and all other terms to the right.
+3x+7x=0-5-12
We simplify left and right side of the equation.
+10x=-17
We divide both sides of the equation by 10 to get x.
x=-1.7
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