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Veronika [31]
3 years ago
7

Number 21 please help! Thank you!

Mathematics
1 answer:
Nina [5.8K]3 years ago
4 0
7 x 3 = 21
7 + 7 +7 = 21
3 ÷ 7 = 21
21 - 7 = 3
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Answer:
Bo teaches 20 classes per week.
Erica teaches 28 classes per week.
Step-by-step explanation:
Let x= yoga classes taught by Bo
and y=yoga classes taught by Erica
We get the following system of equations
x+y=48 (equation 1)
y=2x-12 (equation 2)
Solve the system of equation:
Using equation 1:
x=48-y
Substitute x in equation 2:
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2y+y=84
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Substitute in equation 1:
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So Bo teaches 20 classes per week and Erica teaches 28 classes per week.
Hope this helps :)
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2 years ago
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