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-65=7x+3(-4x-5)
We simplify the equation to the form, which is simple to understand
-65=7x+3(-4x-5)
Reorder the terms in parentheses
-65=7x+(-12x-15)
Remove unnecessary parentheses
-65=+7x-12x-15
We move all terms containing x to the left and all other terms to the right.
-7x+12x=-15+65
We simplify left and right side of the equation.
+5x=+50
We divide both sides of the equation by 5 to get x.
x=10
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