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lorasvet [3.4K]
4 years ago
10

Sara worked 22 hours last week. Joan worked for hours less than Sara, and Erin worked half as many hours as Joan. How many hours

did Sara, Joan, and Erin work last week?
Mathematics
2 answers:
dem82 [27]4 years ago
5 0
Sara - 22
Joan = Sara - 4 = 18
Erin = Joan / 2 = 9
AURORKA [14]4 years ago
4 0

Let

x------> the number of hours Sara worked last week

y------> the number of hours Joan worked last week

z------> the number of hours Erin worked last week

we know that

x=22\ hours -------> equation 1

y=x-4 -------> equation 2

substitute the value of x in the equation 2

y=22-4

y=18\ hours

z=\frac{y}{2} -------> equation 3

substitute the value of y in the equation 3

z=\frac{18}{2}

z=9\ hours

therefore

<u>the answer is</u>

Sara worked 22\ hours

Joan worked 18\ hours

Erin worked 9\ hours

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