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45=-7x+3(2x+13)
We simplify the equation to the form, which is simple to understand
45=-7x+3(2x+13)
Reorder the terms in parentheses
45=-7x+(+6x+39)
Remove unnecessary parentheses
+45=-7x+6x+39
We move all terms containing x to the left and all other terms to the right.
+7x-6x=+39-45
We simplify left and right side of the equation.
+1x=-6
We divide both sides of the equation by 1 to get x.
x=-6
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