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11x-3x+84=11x+54
We simplify the equation to the form, which is simple to understand
11x-3x+84=11x+54
We move all terms containing x to the left and all other terms to the right.
+11x-3x-11x=+54-84
We simplify left and right side of the equation.
-3x=-30
We divide both sides of the equation by -3 to get x.
x=10
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