Graphically
As we can see in the graph, the lines intersect in the ordered pair (-2,7). Then, the solution to the system comprised of these two lines is:

Mathematically
To solve the given system of equations, we can use the equalization method.
Step 1: Either variable is chosen and solved in both equations.

Step 2: The expressions are equalized, obtaining an equation with a variable.

Step 3: We solve for x the resulting equation:
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