3 pens cost $15. What will 30 pens cost?

asked Oct 5, 2016 56.0k views

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If 3 pens cost $15, then we can assume that one pen is $5. If we have 30 pens, multiply $5 by 30 to get a total of $150.

Psyho answered Oct 6, 2016

by Psyho

8.2k points

6 votes

Answer=$150

3 30
___=_____
15 x

cross multiply
3x=450
divide both sides by 3
x=$150

AngelicCore answered Oct 12, 2016

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