45+r/5=81

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Solution for 45+r/5=81 equation: 


r in (-oo:+oo)

r/5+45 = 81 // - 81

r/5-81+45 = 0

1/5*r-36 = 0 // + 36

1/5*r = 36 // : 1/5

r = 36/1/5

r = 180

r = 180

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