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7x-4=9x-28
We simplify the equation to the form, which is simple to understand
7x-4=9x-28
We move all terms containing x to the left and all other terms to the right.
+7x-9x=-28+4
We simplify left and right side of the equation.
-2x=-24
We divide both sides of the equation by -2 to get x.
x=12
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