(30*2.5x)/(2.5+x)=61

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Solution for (30*2.5x)/(2.5+x)=61 equation: 


D( x )

x+2.5 = 0

x+2.5 = 0

x+2.5 = 0

x+2.5 = 0 // - 2.5

x = -2.5

x in (-oo:-2.5) U (-2.5:+oo)

(2.5*30*x)/(x+2.5) = 61 // - 61

(2.5*30*x)/(x+2.5)-61 = 0

(75*x)/(x+2.5)-61 = 0

(75*x)/(x+2.5)+(-61*(x+2.5))/(x+2.5) = 0

75*x-61*(x+2.5) = 0

14*x-152.5 = 0

(14*x-152.5)/(x+2.5) = 0

(14*x-152.5)/(x+2.5) = 0 // * x+2.5

14*x-152.5 = 0

14*x-152.5 = 0 // + 152.5

14*x = 152.5 // : 14

x = 152.5/14

x = 10.89285714

x = 10.89285714

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