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a/9-2/9=-1
We simplify the equation to the form, which is simple to understand
a/9-2/9=-1
We move all terms containing a to the left and all other terms to the right.
+ 0.11111111111111a=-1 + 0.22222222222222
We simplify left and right side of the equation.
+ 0.11111111111111a=-0.77777777777778
We divide both sides of the equation by 0.11111111111111 to get a.
a=-7
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