tn=tn-1-4

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Solution for tn=tn-1-4 equation: 


Simplifying
tn = tn + -1 + -4

Reorder the terms:
nt = -1 + -4 + nt

Combine like terms: -1 + -4 = -5
nt = -5 + nt

Add '-1nt' to each side of the equation.
nt + -1nt = -5 + nt + -1nt

Combine like terms: nt + -1nt = 0
0 = -5 + nt + -1nt

Combine like terms: nt + -1nt = 0
0 = -5 + 0
0 = -5

Solving
0 = -5

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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