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Graph the following system of equations:

[tex]\[
\begin{array}{l}
x + 2y = 6 \\
2x + 4y = 12
\end{array}
\][/tex]

What is the solution to the system?

A. There is no solution.
B. There is one unique solution, \((6,0)\).
C. There is one unique solution, \((0,3)\).
D. There are infinitely many solutions.

Sagot :

Let's analyze the system of equations:

[tex]\[ \begin{array}{l} x + 2y = 6 \quad \text{(Equation 1)} \\ 2x + 4y = 12 \quad \text{(Equation 2)} \end{array} \][/tex]

### Step 1: Simplify the System

Notice that Equation 2 is essentially a multiple of Equation 1. If we divide Equation 2 by 2, we get:

[tex]\[ \frac{2x + 4y}{2} = \frac{12}{2} \][/tex]

This simplifies to:

[tex]\[ x + 2y = 6 \][/tex]

which is identical to Equation 1.

### Step 2: Interpret the System

Since both equations are actually the same when simplified, they represent the same line. This means that every point on the line \( x + 2y = 6 \) is also a point on the line \( 2x + 4y = 12 \).

### Step 3: Conclusion

Because the equations describe the same line, there is not just one single solution or no solutions at all. Instead, there are infinitely many solutions, represented by all the points that lie on the line \( x + 2y = 6 \).

### Graphical Interpretation

If we graph these equations, both would appear as the same line on the coordinate plane. Thus, every point \((x, y)\) that satisfies \( x + 2y = 6 \) also satisfies \( 2x + 4y = 12 \).

### Solution to the System

Given that both equations define the same line, the system has infinitely many solutions. Therefore, the correct answer is:

There are infinitely many solutions.