1 If y = 7 when x= 3, find y when x=5, given that y varies directly with x.
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For this case we must simplify the following expression
We know that, by definition:
So, rewriting the expression we have:
We add similar terms taking into account that:
- Equal signs are added and the same sign is placed.
- Different signs are subtracted and the major's sign is placed:
Answer:
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This the correct answer