The Solution:
Given:
We are required to solve for x and y by the Substitution Method.
Step 1:
Substitute the for y. This means we should equate both equations.
[tex]3x+3=x-1[/tex]
Solving for x in the above linear equation, we get:
[tex]\begin{gathered} 3x-x=-1-3 \\ \\ 2x=-4 \end{gathered}[/tex]
Divide both sides by 2.
[tex]\begin{gathered} \frac{2x}{2}=\frac{-4}{2} \\ \\ x=-2 \end{gathered}[/tex]
Step 2:
Substitute -2 for x in any of the given equations.
[tex]\begin{gathered} y=x-1 \\ y=-2-1 \\ y=-3 \end{gathered}[/tex]
Thus, the correct answer is (-2, -3)
