Solve for K
K=t-3.95
Solve for t
t=K+3.95
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K=t-15.95+12
Add 12 to both sides.
K=t-3.95
Add -15.95 and 12 to get -3.95.
t-15.95=K-12
Swap sides so that all variable terms are on the left hand side.
t=K-12+15.95
Add 15.95 to both sides.
t=K+3.95
Add -12 and 15.95 to get 3.95.
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