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Sagot :
Answer:
- 21 hours in May, 63 hours in June
Step-by-step explanation:
Set up equations
- m - May, j - June
- m + j = 84
- m = 1/3j
Solve by substitution, fin the value of j
- 1/3j + j = 84
- 4/3j = 84
- j = 84*3/4
- j = 63
Find m
- m + 63 = 84
- m = 84 - 63
- m = 21
May be y and June be x
- x+y=84
- y=1/3x
Now
Put y from (2) in eq(1)
- x+1/3x=84
- 3x+x)3=84
- 4x/3=84
- 4x=3(84)
- x=3(21)
- x=63
Find y
- y=1/3(63)
- y=21
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