21/32=3/4r

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Solution for 21/32=3/4r equation: 


r in (-oo:+oo)

21/32 = (3/4)*r // - (3/4)*r

21/32-((3/4)*r) = 0

(-3/4)*r+21/32 = 0

21/32-3/4*r = 0 // - 21/32

-3/4*r = -21/32 // : -3/4

r = -21/32/(-3/4)

r = 7/8

r = 7/8

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