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marusya05 [52]
3 years ago
5

Three times a first number decreased by a second number

Mathematics
1 answer:
ki77a [65]3 years ago
3 0

Answer:

The two numbers are 3 and 5

Step-by-step explanation:

3X-Y=12\\X + 4Y=17\\

Multiply top equation by 4 to cancel out the Ys

12X - 4Y = 48\\X + 4Y = 17\\\\13X = 65\\X = 5\\

Since X =5, we can plug it into either of the top two equations to find out the value of Y

3(5) - Y = 12\\15 - Y = 12\\Y = 3

To double check

3(5) - 3 \\15 - 3\\12\\\\5 + 4(3) \\5 + 12\\17

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