2/5r-15=7 - solution

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Solution for 2/5r-15=7 equation:

r in (-oo:+oo)

(2/5)*r-15 = 7 // - 7

(2/5)*r-15-7 = 0

2/5*r-22 = 0 // + 22

2/5*r = 22 // : 2/5

r = 22/2/5

r = 55

r = 55

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