Get detailed and accurate responses to your questions with IDNLearn.com. Our experts provide timely and accurate responses to help you navigate any topic or issue with confidence.

Application Problems Involving Systems of Equations

Set up a linear system and solve for the following problem:

1. The sum of two integers is 41, and their difference is 5. Find the integers.


Sagot :

Let's set up and solve the system of equations step-by-step:

1. Identify the Variables:
- Let [tex]\( x \)[/tex] be the first integer.
- Let [tex]\( y \)[/tex] be the second integer.

2. Set up the Equations:
- According to the problem, the sum of the two integers is 41. This gives us the first equation:
[tex]\[ x + y = 41 \][/tex]

- The problem also states that the difference between the two integers is 5. This gives us the second equation:
[tex]\[ x - y = 5 \][/tex]

3. Write the System of Equations:
[tex]\[ \begin{cases} x + y = 41 \quad \ \ \ (1)\\ x - y = 5 \ \ \ \ \quad (2) \end{cases} \][/tex]

4. Solve the System of Equations:
- We will solve this system by adding and subtracting the equations to eliminate one of the variables.

- First, add the two equations (1) and (2):
[tex]\[ (x + y) + (x - y) = 41 + 5 \][/tex]
- Simplify this:
[tex]\[ x + y + x - y = 46 \][/tex]
[tex]\[ 2x = 46 \][/tex]
[tex]\[ x = \frac{46}{2} \][/tex]
[tex]\[ x = 23 \][/tex]

- Now, use the value of [tex]\( x \)[/tex] in either equation (1) or (2) to find [tex]\( y \)[/tex]. Let's use equation (1):
[tex]\[ x + y = 41 \][/tex]
[tex]\[ 23 + y = 41 \][/tex]
[tex]\[ y = 41 - 23 \][/tex]
[tex]\[ y = 18 \][/tex]

5. Conclusion:
- The solution to the system of equations is [tex]\((x, y) = (23, 18)\)[/tex].
- Therefore, the two integers are [tex]\( 23 \)[/tex] and [tex]\( 18 \)[/tex].