(t-1)=20

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Solution for (t-1)=20 equation: 


Simplifying
(t + -1) = 20

Reorder the terms:
(-1 + t) = 20

Remove parenthesis around (-1 + t)
-1 + t = 20

Solving
-1 + t = 20

Solving for variable 't'.

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

Add '1' to each side of the equation.
-1 + 1 + t = 20 + 1

Combine like terms: -1 + 1 = 0
0 + t = 20 + 1
t = 20 + 1

Combine like terms: 20 + 1 = 21
t = 21

Simplifying
t = 21

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