3/8=21/(t+4)

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Solution for 3/8=21/(t+4) equation: 


D( t )

t+4 = 0

t+4 = 0

t+4 = 0

t+4 = 0 // - 4

t = -4

t in (-oo:-4) U (-4:+oo)

3/8 = 21/(t+4) // - 21/(t+4)

3/8-(21/(t+4)) = 0

3/8-21*(t+4)^-1 = 0

3/8-21/(t+4) = 0

(-21*8)/(8*(t+4))+(3*(t+4))/(8*(t+4)) = 0

3*(t+4)-21*8 = 0

3*t-156 = 0

(3*t-156)/(8*(t+4)) = 0

(3*t-156)/(8*(t+4)) = 0 // * 8*(t+4)

3*t-156 = 0

3*t-156 = 0 // + 156

3*t = 156 // : 3

t = 156/3

t = 52

t = 52

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