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40+x=2*(9+x)
We simplify the equation to the form, which is simple to understand
40+x=2*(9+x)
Reorder the terms in parentheses
40+x=+(+18+2x)
Remove unnecessary parentheses
+40+x=+18+2x
We move all terms containing x to the left and all other terms to the right.
+1x-2x=+18-40
We simplify left and right side of the equation.
-1x=-22
We divide both sides of the equation by -1 to get x.
x=22
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