exam Maths Puzzle Numerical Ability

Write a formula to represent the function value(nickels,dimes,quarters)

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exam Other Question

Please help me solve this equation. 13x-5y=8
3x+5y=8 Ms K is 6 years more than 3 times as old as her daughter. 8 years ago she was 2 years less than 9 times as old as her daughter was then. What are thier ages?