At-13=57

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Solution for At-13=57 equation: 


Simplifying
At + -13 = 57

Reorder the terms:
-13 + tA = 57

Solving
-13 + tA = 57

Solving for variable 't'.

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

Add '13' to each side of the equation.
-13 + 13 + tA = 57 + 13

Combine like terms: -13 + 13 = 0
0 + tA = 57 + 13
tA = 57 + 13

Combine like terms: 57 + 13 = 70
tA = 70

Divide each side by 'A'.
t = 70A-1

Simplifying
t = 70A-1

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