The average temperature on Friday, Saturday and Sunday was $$26^\circ$$ and on saturaday, Sunday and Monday it was $$24^\circ$$. If on Monday it was exactly $$25^\circ$$. Then what was the temperature on Friday.
Sum of temperatures on Friday, Saturday and Sunday =78
Sum of temperatures on Monday,Saturday and Sunday=72
Difference between temperature on Friday and Monday=6
On Monday=25
Friday=25+6
=31
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