Question 1160502
How many more hours?  More than what?


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The cost of a guitar is $299. David has saved $42 for his new purchase. His parents are willing to give him three times what he has saved. On the weekends, David cuts lawns for $20 an hour. How many {{{cross(more)}}} hours will David have to work until he has enough money to purchase his guitar?
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x hours to work at $20 per hour

{{{42+3*42+20x=299}}}

{{{20x=299-4*42}}}

{{{x=6.55}}}{{{hours}}}
Or close enough to {{{6&1/2}}}{{{hours}}}



( 6 hours 33 minutes )