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

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

(2.63*r-8.99)/1.25-0.40816327*(3.9*r-1.77)-r = 0

(2.63*r-8.99)/1.25+(-0.40816327*1.25*(3.9*r-1.77))/1.25+(1.25*(-r))/1.25 = 0

2.63*r-0.40816327*1.25*(3.9*r-1.77)+1.25*(-r)-8.99 = 0

0.64020405875*r-1.25*r-8.086938765125 = 0

-0.60979594125*r-8.086938765125 = 0

(-0.60979594125*r-8.086938765125)/1.25 = 0

(-0.60979594125*r-8.086938765125)/1.25 = 0 // * 1.25

-0.60979594125*r-8.086938765125 = 0

-0.60979594125*r-8.086938765125 = 0 // + 8.086938765125

-0.60979594125*r = 8.086938765125 // : -0.60979594125

r = 8.086938765125/(-0.60979594125)

r = -13.26171301

r = -13.26171301

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