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julsineya [31]
3 years ago
10

You and your friend each start a car-washing service. you spend $25 on supplies and charge $10 per car. your friend spends $55 o

n supplies and charges $13 per car. how many cars do you have to wash to earn the same amount of money as your friend?
Mathematics
1 answer:
lakkis [162]3 years ago
7 0
Let x be the number of cars. We will find out how many cars you have to wash to make as much money as your friend:
10x - 25= 13x - 55 Add 25 on both sides and subtract 13x, also both sides:
3x = -30 Now divide both sides by -3:
x= 10 cars you have to wash.

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