During first semester, the ratio of the number of students in art class to the number of students in gym class was 2:7. However,
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- First, we find the <u>lowest common denominator</u> which is "14", we put it in the common numerator.
- We subtract the numbers.
Suppose you can factorize:
Then by expanding the right side, you have
which means in this case, you have to have
Then by expanding the right side, you have
which means in this case, you have to have