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The sum of two numbers is 45, and the larger number is 3 more than the smaller number. What is the smaller number?

24
21
18

Respuesta :

gullanddavid

Answer:

21

Step-by-step explanation:

I set up a system of equations firstly.

     x + y = 45

     x = y + 3

After that, I substituted the equation I made for x into the parent equation, which simplified is 2y + 3 = 45.

Then, I subtracted the 3, then divided the result of 42 by 2, which gave me 21.

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