exam Maths Puzzle Numerical Ability

Mom had P pounds of cookies and this would feed C children for M minutes. Yet N more children showed up. In how many minutes will P pounds of cookies be devoured by the children?

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Tutor,

Could I get some help with this problem? I am having difficulty solving it.

x/5x + 10 + x-3/x+2 = 7/5

Thank you for your help. How do I simplify this expression?

(75x(squared)-12) divided by (35-2x-x(squared) over x(squared)+7x divided by x-5 over 5x(x is to 3rd power)+2x(square) )

i sure hope this m