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Assume that y varies directly with x, then solve if y=12 when x=15, find x when y=21 and can someone explain to me how they got the answer because i got 16.8

Assume that y varies directly with x, then solve if y=12 when x=15, find x when y=21 and can someone explain to me how they got the answer because i got 16.8
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Assume that y varies directly with x, then solve if y=12 when x=15, find x when y=21

and can someone explain to me how they got the answer because i got 16.8

User Travis Britz
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2 Answers

1 vote
If y is 12 when x is 15 that means that x is 3 more than y. x=y+3 so when y is 21, x=21+3 so x=24
User Neoice
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8.2k points
4 votes
24 beacuse x is 3 more than y
User Chris Boon
by
8.4k points
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