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7+7x+7x=63
We simplify the equation to the form, which is simple to understand
7+7x+7x=63
We move all terms containing x to the left and all other terms to the right.
+7x+7x=+63-7
We simplify left and right side of the equation.
+14x=+56
We divide both sides of the equation by 14 to get x.
x=4
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