Amy used #3# gallons of paint to cover #2,100 ft^2# of wall space inside her house. How much wall space can she paint with #7# gallons?

1 Answer
Suren Abreu
Nov 15, 2016

#4900ft^2#

Explanation:

If #3# gallons of paint were used for #2100ft^2# of wall space, #1# gallon of paint would be used for one third that wall space. This can be written as:

#x=2100/3#

#x=700#

Hence, #1# gallon of paint can cover #700ft^2# of wall space.

To determine the amount of wall space (#y#) that can be covered with #7# gallons of paint, we can write:

#y=700xx7#

#y=4900#

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