20=100-20t

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Solution for 20=100-20t equation:


Simplifying
20 = 100 + -20t

Solving
20 = 100 + -20t

Solving for variable 't'.

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

Add '20t' to each side of the equation.
20 + 20t = 100 + -20t + 20t

Combine like terms: -20t + 20t = 0
20 + 20t = 100 + 0
20 + 20t = 100

Add '-20' to each side of the equation.
20 + -20 + 20t = 100 + -20

Combine like terms: 20 + -20 = 0
0 + 20t = 100 + -20
20t = 100 + -20

Combine like terms: 100 + -20 = 80
20t = 80

Divide each side by '20'.
t = 4

Simplifying
t = 4

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