16-(r/7)=21

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Solution for 16-(r/7)=21 equation: 


r in (-oo:+oo)

16-(r/7) = 21 // - 21

16-(r/7)-21 = 0

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

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

r = 5/(-1/7)

r = -35

r = -35

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