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Timothy has hired Cynthia and Dominic to cover the roof with shingles. Dominic can install 180 shingles in the same time it takes Cynthia to

Timothy has hired Cynthia and Dominic to cover the roof with shingles. Dominic can install 180 shingles in the same time it takes Cynthia to install 150 shingles, which can be shown using the following relationship whereandare the respective rates for Dominic and Cynthia:

180/d=150/c

Also, Dominic can install 10 shingles more per hour than Cynthia.

How many shingles can Cynthia install per hour?

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