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5x-3x+9=39
We simplify the equation to the form, which is simple to understand
5x-3x+9=39
We move all terms containing x to the left and all other terms to the right.
+5x-3x=+39-9
We simplify left and right side of the equation.
+2x=+30
We divide both sides of the equation by 2 to get x.
x=15
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