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(-9+a)/15=1
We simplify the equation to the form, which is simple to understand
(-9+a)/15=1
Reorder the terms in parentheses
(-0.6 + 0.0666666666667a)=1
Remove unnecessary parentheses
-0.6 + 0.0666666666667a=1
We move all terms containing a to the left and all other terms to the right.
+ 0.0666666666667a=+1 + 0.6
We simplify left and right side of the equation.
+ 0.0666666666667a=+1.6
We divide both sides of the equation by 0.0666666666667 to get a.
a=24
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