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Jenny, Kenny, and Penny together have 51 marbles. Kenny has double as many marbles as Jenny...

Jenny, Kenny, and Penny together have 51 marbles. Kenny has double as many marbles as Jenny has, and Penny has 12.

If n is the number of marbles that Jenny has, write an expression using n to for Jenny and Kenny to give the number of marbles Jenny, Kenny and Penny have altogether:

Jenny's marbles + Kenny's marbles + Penny's marbles = Total marbles

____+____+=_____

How many marbles does Jenny have?

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Math   Statistics-And-Probability   
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Answer #1

Solution:

We are given that there are total 51 marbles and Penny has 12 marbles. Kenny has double as many marbles as Jenny has.

Let n be the number of marbles Jenny has.

Therefore, we have:

How many marbles does Jenny have?

marbles

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