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chloemafracis222 chloemafracis222

17-06-2019
Mathematics

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The sum of two numbers is 28. The first number, x, is three times the second number, y. Which system of equations can be used to find the two numbers?

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Аноним Аноним

17-06-2019

Answer:

The ratio is 1:3.

The second number,y, is 7 and the first number, x, is 21.

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mhoang537 mhoang537

17-06-2019

First x+y=28 (1)
Second x=3y

(1) => 3y+y=28 => 4y=28 => y=7 and x=3y =3*7=21

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