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7x+15=3(3x+9)
We simplify the equation to the form, which is simple to understand
7x+15=3(3x+9)
Reorder the terms in parentheses
7x+15=+(+9x+27)
Remove unnecessary parentheses
+7x+15=+9x+27
We move all terms containing x to the left and all other terms to the right.
+7x-9x=+27-15
We simplify left and right side of the equation.
-2x=+12
We divide both sides of the equation by -2 to get x.
x=-6
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