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2/9(a+9)=20
We simplify the equation to the form, which is simple to understand
2/9(a+9)=20
Simplifying:
+ 0.222222222222*(a+9)=20
Reorder the terms in parentheses
+( + 0.222222222222a+2)=20
Remove unnecessary parentheses
+ 0.222222222222a+2=+20
We move all terms containing a to the left and all other terms to the right.
+ 0.222222222222a=+20-2
We simplify left and right side of the equation.
+ 0.222222222222a=+18
We divide both sides of the equation by 0.222222222222 to get a.
a=81
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