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VladimirAG [237]
3 years ago
13

One number is seven more than three times another number. If the sum of the numbers is 15, find the numbers.

Mathematics
1 answer:
dimulka [17.4K]3 years ago
4 0

Answer:

2 and 13

Step-by-step explanation:

We can use systems of equations here to find both the numbers. Let's assume one of the numbers is x and the other is y.

We know that these numbers add up to 15, so x + y = 15.

We also know that one of these numbers is 7 more than 3 times the other, so x = 3y + 7.

We can now substitute the equation x = 3y + 7 into x + y = 15.

(3y + 7) + y = 15

Combine like terms:

4y + 7 = 15

Subtract 7 from both sides:

4y = 8

Divide both sides by 4:

y = 2.

Now that we know the value of y, we can substitute it inside an equation to find x. Let's substitute it inside x + y = 15.

x + 2 = 15\\\\x = 15-2\\\\x = 13

So the two numbers are 2 and 13.

Hope this helped!

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