7/4=r/5

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Solution for 7/4=r/5 equation: 


r in (-oo:+oo)

7/4 = r/5 // - r/5

7/4-(r/5) = 0

7/4-1/5*r = 0 // - 7/4

-1/5*r = -7/4 // : -1/5

r = -7/4/(-1/5)

r = 35/4

r = 35/4

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