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7x+15=9x-39
We simplify the equation to the form, which is simple to understand
7x+15=9x-39
We move all terms containing x to the left and all other terms to the right.
+7x-9x=-39-15
We simplify left and right side of the equation.
-2x=-54
We divide both sides of the equation by -2 to get x.
x=27
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