exam Maths Puzzle Numerical Ability

One number is 11 less than another. If 10 times the smaller number minus 3 times the larger number is 30, find the two numbers.No book. Sorry. Thankyou!!!

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I am having problems with this

Subtract: Express your answer in simplist form:
2/5-y/y-2

Thank you What is the answer for mn to the 2nd power over pm to the 5th power n?