-7+r/5=-9 - solution

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Solution for -7+r/5=-9 equation:

r in (-oo:+oo)

r/5-7 = -9 // + 9

r/5-7+9 = 0

1/5*r+2 = 0 // - 2

1/5*r = -2 // : 1/5

r = -2/1/5

r = -10

r = -10

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