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Re: Right Way house painting charges its customers [#permalink]
Start with B or D. I'll start with D cause it's cleaner. For Customer M $45 per hour for 20 hours equals $900 total from just hourly pay. Thus, 1050-900 = 150 left per gallon. 150/5 = 30$ per gallon.

Now lets plug 45$ per hour wage into second customer and see if we get 30$ per gallon.

45x15= 675. Total amount 795-675=120 left for paint gallons.

120/4 gallons equals 30$ per gallon which is the same as customer M. Thus, the hourly wage is 45 per hour.
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Re: Right Way house painting charges its customers [#permalink]
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­Practice manipulating equations instead of isolating and plugging in:

­
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Re: Right Way house painting charges its customers [#permalink]
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