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13x+21=54
We simplify the equation to the form, which is simple to understand
13x+21=54
We move all terms containing x to the left and all other terms to the right.
+13x=+54-21
We simplify left and right side of the equation.
+13x=+33
We divide both sides of the equation by 13 to get x.
x=2.53846153846
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