640=1600-80t

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Solution for 640=1600-80t equation:


Simplifying
640 = 1600 + -80t

Solving
640 = 1600 + -80t

Solving for variable 't'.

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

Add '80t' to each side of the equation.
640 + 80t = 1600 + -80t + 80t

Combine like terms: -80t + 80t = 0
640 + 80t = 1600 + 0
640 + 80t = 1600

Add '-640' to each side of the equation.
640 + -640 + 80t = 1600 + -640

Combine like terms: 640 + -640 = 0
0 + 80t = 1600 + -640
80t = 1600 + -640

Combine like terms: 1600 + -640 = 960
80t = 960

Divide each side by '80'.
t = 12

Simplifying
t = 12

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