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42=7+9x
We simplify the equation to the form, which is simple to understand
42=7+9x
We move all terms containing x to the left and all other terms to the right.
-9x=+7-42
We simplify left and right side of the equation.
-9x=-35
We divide both sides of the equation by -09 to get x.
x=3.88888888889
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