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otez555 [7]
2 years ago
8

LOOK AT THE PHOTO NEED HELP Number 10

Mathematics
1 answer:
Nikitich [7]2 years ago
3 0

Answer:

x=15

Step-by-step explanation:

If x is 3 and y is 21, then that means that y is 7 times the value of x (21/3=7), or y=7x.  

If y is 105, then 105=7x

105=7x

105/7=x

15=x

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