If you subtract 18 from my number and multiply the difference by -2, the result is -20. What is Saras number
1 answer:
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Answer:
58 students
Step-by-step explanation:
Given
Required
Students that take only 1 subjects
The attached image illustrates the question.
For French only (x), we have:
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For Geometry only (y), we have:
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For History only (z), we have:
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Students with one subject is then calculated as:
