D(t)=16+15t-t^2

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Solution for D(t)=16+15t-t^2 equation: 


Simplifying
D(t) = 16 + 15t + -1t2

Multiply D * t
tD = 16 + 15t + -1t2

Solving
tD = 16 + 15t + -1t2

Solving for variable 't'.

Reorder the terms:
-16 + -15t + tD + t2 = 16 + 15t + -1t2 + -16 + -15t + t2

Reorder the terms:
-16 + -15t + tD + t2 = 16 + -16 + 15t + -15t + -1t2 + t2

Combine like terms: 16 + -16 = 0
-16 + -15t + tD + t2 = 0 + 15t + -15t + -1t2 + t2
-16 + -15t + tD + t2 = 15t + -15t + -1t2 + t2

Combine like terms: 15t + -15t = 0
-16 + -15t + tD + t2 = 0 + -1t2 + t2
-16 + -15t + tD + t2 = -1t2 + t2

Combine like terms: -1t2 + t2 = 0
-16 + -15t + tD + t2 = 0

The solution to this equation could not be determined.

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