3-1/2r=9/2

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Solution for 3-1/2r=9/2 equation: 


r in (-oo:+oo)

3-((1/2)*r) = 9/2 // - 9/2

3-((1/2)*r)-(9/2) = 0

(-1/2)*r-9/2+3 = 0

-1/2*r-3/2 = 0 // + 3/2

-1/2*r = 3/2 // : -1/2

r = 3/2/(-1/2)

r = -3

r = -3

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