F1 Maths ~~~ Algebra

用戶49050

2014-10-10 5:16 am

Equation in one unknown

1) May has $300 at the beginning of a week. Each day her mother gives her $y and she spends $25. At the end of week, she gives $85 to her brother and in her wallet, only $200 left. Find the value of y.

2) After employing 10 more employees, a company divides all the employees into 3 departments , each having 12 employees. Find the original number of employees.

回答 (1)

用戶26240

2014-10-10 5:50 am

✔ 最佳答案

1)
Mayhas $300 at the beginning of a week. Each day her mother gives her $y and shespends $25. At the end of week, she gives $85 to her brother and in her wallet,only $200 left. Find the value of y.

Solution :
300 + 7(y - 25) - 85 = 200
300 + 7y - 175 - 85 = 200
7y = 160
y = 160/7

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2)
Afteremploying 10 more employees, a company divides all the employees into 3departments , each having 12 employees. Find the original number of employees.
Solution :
Let n be the original number of employees.

n + 10 = 3 × 12
n = 26

The original number of employees = 26

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