3-r/8=-9/2

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Solution for 3-r/8=-9/2 equation: 


r in (-oo:+oo)

3-(r/8) = -9/2 // + -9/2

3-(r/8)-(-9/2) = 0

9/2-(r/8)+3 = 0

15/2-1/8*r = 0 // - 15/2

-1/8*r = -15/2 // : -1/8

r = -15/2/(-1/8)

r = 60

r = 60

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