-18=(9-a)/2

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Solution for -18=(9-a)/2 equation:


a in (-oo:+oo)

-18 = (9-a)/2 // - (9-a)/2

-((9-a)/2)-18 = 0

(-1*(9-a))/2-18 = 0

(-1*(9-a))/2+(-18*2)/2 = 0

-1*(9-a)-18*2 = 0

a-45 = 0

(a-45)/2 = 0

(a-45)/2 = 0 // * 2

a-45 = 0

a-45 = 0 // + 45

a = 45

a = 45

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