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99=1/2x(2+9)
We simplify the equation to the form, which is simple to understand
99=1/2x(2+9)
Reorder the terms in parentheses
99=+(+22x)
Remove unnecessary parentheses
+99=+22x
We move all terms containing x to the left and all other terms to the right.
-22x=-99
We simplify left and right side of the equation.
-22x=-99
We divide both sides of the equation by -022 to get x.
x=4.5
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