-2/7r=-6

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Solution for -2/7r=-6 equation: 


r in (-oo:+oo)

(-2/7)*r = -6 // + 6

(-2/7)*r+6 = 0

6-2/7*r = 0 // - 6

-2/7*r = -6 // : -2/7

r = -6/(-2/7)

r = 21

r = 21

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