20+4/7r=-20

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Solution for 20+4/7r=-20 equation: 


r in (-oo:+oo)

(4/7)*r+20 = -20 // + 20

(4/7)*r+20+20 = 0

4/7*r+40 = 0 // - 40

4/7*r = -40 // : 4/7

r = -40/4/7

r = -70

r = -70

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