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13x-8x=20
We simplify the equation to the form, which is simple to understand
13x-8x=20
We move all terms containing x to the left and all other terms to the right.
+13x-8x=+20
We simplify left and right side of the equation.
+5x=+20
We divide both sides of the equation by 5 to get x.
x=4
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