2.63r-8.99/1.25-3.90r-1.77/2.45=r

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Solution for 2.63r-8.99/1.25-3.90r-1.77/2.45=r equation: 


r in (-oo:+oo)

2.63*r-(3.9*r)-(8.99/1.25)-(1.77/2.45) = r // - r

2.63*r-(3.9*r)-r-(8.99/1.25)-(1.77/2.45) = 0

2.63*r-3.9*r-r-7.192-0.72244898 = 0

-2.27*r-7.91444898 = 0 // + 7.91444898

-2.27*r = 7.91444898 // : -2.27

r = 7.91444898/(-2.27)

r = -3.4865414

r = -3.4865414

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