P(t)=400+21t

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Solution for P(t)=400+21t equation: 


Simplifying
P(t) = 400 + 21t

Multiply P * t
tP = 400 + 21t

Solving
tP = 400 + 21t

Solving for variable 't'.

Move all terms containing t to the left, all other terms to the right.

Add '-21t' to each side of the equation.
-21t + tP = 400 + 21t + -21t

Combine like terms: 21t + -21t = 0
-21t + tP = 400 + 0
-21t + tP = 400

Reorder the terms:
-400 + -21t + tP = 400 + -400

Combine like terms: 400 + -400 = 0
-400 + -21t + tP = 0

The solution to this equation could not be determined.

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