To solve this problem you must apply the proccedure shown below:
1. You have the folllowing system of equations given in the problem above:
22x − y = -23 (equation 1)
11x + 12y = 1 (equation 2)
2. If you multiply the equation 2 by -2, and then sum the equation 1+equation 2, you obtain:
-25y=-25
y=1
3. Then, you must substitute y=1 into the equation 1, then you have:
x=-1
4. As you can see, when you solve it, the solutions are:
x=-1
y=1
