A train travels 524 miles in 4, 1/2 hours. Which expression gives the train's speed in miles per hour?
1 answer:
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Answer:
The number is 3.
Step-by-step explanation:
To find : A number which decreased by 12 equals 3 times it’s opposite ?
Solution :
Let the number be 'x'.
It's opposite is '-x'.
A number which decreased by 12 equals 3 times it’s opposite
i.e.
Solving the equation,
Therefore, the number is 3.