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5x-21=8x+30
We simplify the equation to the form, which is simple to understand
5x-21=8x+30
We move all terms containing x to the left and all other terms to the right.
+5x-8x=+30+21
We simplify left and right side of the equation.
-3x=+51
We divide both sides of the equation by -3 to get x.
x=-17
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