2/4=r/8

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Solution for 2/4=r/8 equation: 


r in (-oo:+oo)

2/4 = r/8 // - r/8

2/4-(r/8) = 0

1/2-1/8*r = 0 // - 1/2

-1/8*r = -1/2 // : -1/8

r = -1/2/(-1/8)

r = 4

r = 4

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