2/5r=-12 - solution

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Solution for 2/5r=-12 equation:

r in (-oo:+oo)

(2/5)*r = -12 // + 12

(2/5)*r+12 = 0

2/5*r+12 = 0 // - 12

2/5*r = -12 // : 2/5

r = -12/2/5

r = -30

r = -30

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