r/2.1=4.5/3.5

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Solution for r/2.1=4.5/3.5 equation: 


r in (-oo:+oo)

r/2.1 = 4.5/3.5 // - 4.5/3.5

r/2.1-(4.5/3.5) = 0

r/2.1-1.28571429 = 0

0.47619048*r-1.28571429 = 0 // + 1.28571429

0.47619048*r = 1.28571429 // : 0.47619048

r = 1.28571429/0.47619048

r = 2.69999999

r = 2.69999999

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