Use the substitution method to solve the system of equations. Choose the correct ordered pair.

[tex]\[
\begin{array}{l}
2x + 3y = 11 \\
y = x - 3
\end{array}
\][/tex]

A. [tex]\((3,0)\)[/tex]

B. [tex]\((1,3)\)[/tex]

C. [tex]\((4,1)\)[/tex]

D. [tex]\((5,2)\)[/tex]



Answer :

To solve the system of equations using the substitution method, follow these steps:

Given equations:
1. [tex]\( 2x + 3y = 11 \)[/tex]
2. [tex]\( y = x - 3 \)[/tex]

Step 1: Substitute the expression for [tex]\( y \)[/tex] from the second equation into the first equation.
[tex]\[ 2x + 3(x - 3) = 11 \][/tex]

Step 2: Distribute and combine like terms.
[tex]\[ 2x + 3x - 9 = 11 \][/tex]

Step 3: Combine the [tex]\( x \)[/tex] terms.
[tex]\[ 5x - 9 = 11 \][/tex]

Step 4: Add 9 to both sides to isolate the [tex]\( x \)[/tex] term.
[tex]\[ 5x - 9 + 9 = 11 + 9 \][/tex]
[tex]\[ 5x = 20 \][/tex]

Step 5: Divide both sides by 5 to solve for [tex]\( x \)[/tex].
[tex]\[ x = \frac{20}{5} \][/tex]
[tex]\[ x = 4 \][/tex]

Step 6: Substitute the value of [tex]\( x \)[/tex] back into the second equation to find [tex]\( y \)[/tex].
[tex]\[ y = x - 3 \][/tex]
[tex]\[ y = 4 - 3 \][/tex]
[tex]\[ y = 1 \][/tex]

Therefore, the solution to the system of equations is the ordered pair [tex]\((4, 1)\)[/tex].

Thus, the correct choice is:
C. [tex]\((4, 1)\)[/tex]