5+r/-2+3=-7 - solution

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Solution for 5+r/-2+3=-7 equation:

r in (-oo:+oo)

r/(-2)+3+5 = -7 // + 7

r/(-2)+3+5+7 = 0

15-1/2*r = 0 // - 15

-1/2*r = -15 // : -1/2

r = -15/(-1/2)

r = 30

r = 30

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