book Maths Puzzle Numerical Ability

[1,1] [0,3]
2x+y=3

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book Other Question

WHAT IS THE SUM OF CUBES FOR 81xCUBED + 3 Leanna has $37 to spend in a record store. She can spend all of the money on two compact discs and a cassette, or she can buy one CD and two cassettes and have $5 left over. What is the price of a CD? What is the price a cassette?