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What is the solution to the system of equations below when graphed?

[tex]
\begin{array}{l}
y = 2x - 5 \\
y = x + 3
\end{array}
[/tex]

A. [tex]$(9,12)$[/tex]
B. [tex]$(2,5)$[/tex]
C. [tex]$(8,11)$[/tex]
D. [tex]$(3,8)$[/tex]


Sagot :

To determine the solution of the system of equations given by
[tex]\[ y = 2x - 5 \][/tex]
and
[tex]\[ y = x + 3 \][/tex]
we need to find the point at which these two lines intersect.

The point of intersection is the set of coordinates [tex]\((x, y)\)[/tex] that satisfies both equations simultaneously.

Start by setting the two equations equal to each other, since both equations equal [tex]\(y\)[/tex]:
[tex]\[ 2x - 5 = x + 3 \][/tex]

To solve for [tex]\(x\)[/tex], first isolate [tex]\(x\)[/tex] on one side of the equation:
[tex]\[ 2x - x = 3 + 5 \][/tex]

Simplify the equation:
[tex]\[ x = 8 \][/tex]

Now, substitute [tex]\(x = 8\)[/tex] back into either of the original equations to find [tex]\(y\)[/tex]. We'll use the second equation for this purpose:
[tex]\[ y = 8 + 3 \][/tex]

So,
[tex]\[ y = 11 \][/tex]

Therefore, the solution to this system of equations is the point where the two lines intersect:
[tex]\[ (x, y) = (8, 11) \][/tex]

So, the correct answer is:
C. [tex]\((8, 11)\)[/tex]