42/49=r/28

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Solution for 42/49=r/28 equation: 


r in (-oo:+oo)

42/49 = r/28 // - r/28

42/49-(r/28) = 0

6/7-1/28*r = 0 // - 6/7

-1/28*r = -6/7 // : -1/28

r = -6/7/(-1/28)

r = 24

r = 24

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