k/2-9=30 - solution

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Solution for k/2-9=30 equation:

k in (-oo:+oo)

k/2-9 = 30 // - 30

k/2-30-9 = 0

1/2*k-39 = 0 // + 39

1/2*k = 39 // : 1/2

k = 39/1/2

k = 78

k = 78

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