-3-7+r/9

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Solution for -3-7+r/9 equation: 


r in (-oo:+oo)

r/9-7-3 = 0

1/9*r-10 = 0 // + 10

1/9*r = 10 // : 1/9

r = 10/1/9

r = 90

r = 90

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