3-r/8=-9/12

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Solution for 3-r/8=-9/12 equation: 


r in (-oo:+oo)

3-(r/8) = -9/12 // + -9/12

3-(r/8)-(-9/12) = 0

3/4-(r/8)+3 = 0

15/4-1/8*r = 0 // - 15/4

-1/8*r = -15/4 // : -1/8

r = -15/4/(-1/8)

r = 30

r = 30

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