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3 pens cost $15. What will 30 pens cost?
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3 pens cost $15. What will 30 pens cost?
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Oct 5, 2016
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3 pens cost $15. What will 30 pens cost?
Mathematics
middle-school
Panos Bechlivanos
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Panos Bechlivanos
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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
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Oct 6, 2016
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Psyho
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Answer=$150
3 30
___=_____
15 x
cross multiply
3x=450
divide both sides by 3
x=$150
AngelicCore
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Oct 12, 2016
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