4/5-5/2r=3/10

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Solution for 4/5-5/2r=3/10 equation: 


r in (-oo:+oo)

4/5-((5/2)*r) = 3/10 // - 3/10

4/5-((5/2)*r)-(3/10) = 0

(-5/2)*r+4/5-3/10 = 0

1/2-5/2*r = 0 // - 1/2

-5/2*r = -1/2 // : -5/2

r = -1/2/(-5/2)

r = 1/5

r = 1/5

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