(2.63r-8.97)/1.25-(3.90r-1.78)/2.65=r

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Solution for (2.63r-8.97)/1.25-(3.90r-1.78)/2.65=r equation: 


r in (-oo:+oo)

(2.63*r-8.97)/1.25-((3.9*r-1.78)/2.65) = r // - r

(2.63*r-8.97)/1.25-((3.9*r-1.78)/2.65)-r = 0

(2.63*r-8.97)/1.25-0.37735849*(3.9*r-1.78)-r = 0

(2.63*r-8.97)/1.25+(-0.37735849*1.25*(3.9*r-1.78))/1.25+(1.25*(-r))/1.25 = 0

2.63*r-0.37735849*1.25*(3.9*r-1.78)+1.25*(-r)-8.97 = 0

0.79037736125*r-1.25*r-8.13037735975 = 0

-0.45962263875*r-8.13037735975 = 0

(-0.45962263875*r-8.13037735975)/1.25 = 0

(-0.45962263875*r-8.13037735975)/1.25 = 0 // * 1.25

-0.45962263875*r-8.13037735975 = 0

-0.45962263875*r-8.13037735975 = 0 // + 8.13037735975

-0.45962263875*r = 8.13037735975 // : -0.45962263875

r = 8.13037735975/(-0.45962263875)

r = -17.68924477

r = -17.68924477

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