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-39+12x=36+9x
We simplify the equation to the form, which is simple to understand
-39+12x=36+9x
We move all terms containing x to the left and all other terms to the right.
+12x-9x=+36+39
We simplify left and right side of the equation.
+3x=+75
We divide both sides of the equation by 3 to get x.
x=25
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