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How many solutions does the system of equations below have?

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

A. No solution
B. At least 1 solution
C. More than 1 solution
D. Exactly 1 solution


Sagot :

To determine the number of solutions for the given system of equations:
[tex]\[ \begin{array}{l} y = 2x + 4 \\ y + 6 = 2x \end{array} \][/tex]

we will analyze each equation and then compare them.

1. Rewrite the second equation to match the first equation's format:
[tex]\[ y + 6 = 2x \][/tex]
Isolate [tex]\(y\)[/tex] on the left side by subtracting 6 from both sides:
[tex]\[ y = 2x - 6 \][/tex]

Now, we have the following system of equations from both transformations:
[tex]\[ \begin{array}{l} y = 2x + 4 \\ y = 2x - 6 \end{array} \][/tex]

2. Compare the two equations to find the number of intersections (solutions):
[tex]\[ 2x + 4 = 2x - 6 \][/tex]
Subtract [tex]\(2x\)[/tex] from both sides to isolate the constants:
[tex]\[ 4 = -6 \][/tex]

Given that [tex]\(4\)[/tex] does not equal [tex]\(-6\)[/tex], this equation has no solution. Thus, there is no [tex]\(x\)[/tex] that satisfies both equations simultaneously.

Therefore, since there is no point [tex]\((x, y)\)[/tex] that satisfies both equations, the system of equations has no solution.

A. No solution is the correct answer.