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Solve the system of linear equations.

Wally has a total of 212 stamps. He has 34 more domestic stamps than foreign stamps. Let [tex][tex]$x$[/tex][/tex] represent the number of domestic stamps and [tex][tex]$y$[/tex][/tex] represent the number of foreign stamps.

This system of equations models the given information:
[tex]\[
\begin{array}{l}
x - y = 34 \\
x + y = 212
\end{array}
\][/tex]

Solve the system of equations.

How many foreign stamps does Wally have?
[tex][tex]$\square$[/tex][/tex] foreign stamps

How many domestic stamps does Wally have?
[tex][tex]$\qquad$[/tex][/tex] domestic stamps


Sagot :

Let's solve this system of linear equations step by step. The given equations are:

1. [tex]\(x - y = 34\)[/tex] [tex]\(\quad \text{(Equation 1)}\)[/tex]
2. [tex]\(x + y = 212\)[/tex] [tex]\(\quad \text{(Equation 2)}\)[/tex]

Where:
- [tex]\(x\)[/tex] represents the number of domestic stamps.
- [tex]\(y\)[/tex] represents the number of foreign stamps.

### Step-by-Step Solution:

Step 1: Add the Two Equations

First, we'll add Equation 1 and Equation 2 to eliminate [tex]\(y\)[/tex]:

[tex]\[ (x - y) + (x + y) = 34 + 212 \][/tex]

This simplifies to:

[tex]\[ 2x = 246 \][/tex]

Step 2: Solve for [tex]\(x\)[/tex]

Next, we'll solve for [tex]\(x\)[/tex] by dividing both sides by 2:

[tex]\[ x = \frac{246}{2} = 123 \][/tex]

So, the number of domestic stamps [tex]\(x = 123\)[/tex].

Step 3: Solve for [tex]\(y\)[/tex]

Now, we use Equation 2 to solve for [tex]\(y\)[/tex]:

[tex]\[ x + y = 212 \][/tex]

Substitute [tex]\(x = 123\)[/tex] into the equation:

[tex]\[ 123 + y = 212 \][/tex]

Subtract 123 from both sides:

[tex]\[ y = 212 - 123 \][/tex]

This simplifies to:

[tex]\[ y = 89 \][/tex]

So, the number of foreign stamps [tex]\(y = 89\)[/tex].

### Final Answer:

- Number of foreign stamps Malik has: [tex]\( \boxed{89} \)[/tex] foreign stamps.

- Number of domestic stamps Malik has: [tex]\( \boxed{123} \)[/tex] domestic stamps.