t/(t+9)+3=15/(t+9)

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Solution for t/(t+9)+3=15/(t+9) equation: 


D( t )

t+9 = 0

t+9 = 0

t+9 = 0

t+9 = 0 // - 9

t = -9

t in (-oo:-9) U (-9:+oo)

t/(t+9)+3 = 15/(t+9) // - 15/(t+9)

t/(t+9)-(15/(t+9))+3 = 0

t/(t+9)-15*(t+9)^-1+3 = 0

t/(t+9)-15/(t+9)+3 = 0

t/(t+9)-15/(t+9)+(3*(t+9))/(t+9) = 0

3*(t+9)+t-15 = 0

t+3*t-15+27 = 0

4*t+12 = 0

(4*t+12)/(t+9) = 0

(4*t+12)/(t+9) = 0 // * t+9

4*t+12 = 0

4*t+12 = 0 // - 12

4*t = -12 // : 4

t = -12/4

t = -3

t = -3

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