exam Maths Puzzle Numerical Ability

I need help with this homework problem:
t+22/t square-t-72 + 8/t-9 = 4/t+8

Thank you.

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exam Other Question

how to solve a rational equation like this one 8/x+1/3=5/x decide wether the relation is a function. if it is a function give the domain and the range.

0 6, -6

1 5, -5