91-t=20

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Solution for 91-t=20 equation: 


Simplifying
91 + -1t = 20

Solving
91 + -1t = 20

Solving for variable 't'.

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

Add '-91' to each side of the equation.
91 + -91 + -1t = 20 + -91

Combine like terms: 91 + -91 = 0
0 + -1t = 20 + -91
-1t = 20 + -91

Combine like terms: 20 + -91 = -71
-1t = -71

Divide each side by '-1'.
t = 71

Simplifying
t = 71

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