Answer:
x = 2; y = 5
Explanation:
Method to solve: Elimination:
Solving for x:
The two equations in the system are arranged in such a way that allows us to solve for x and eliminate the ys (y - y = 0):
x + y = 7
+
2x - y = -1
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(x + 2x) + (y - y) = (7 - 1)
(3x = 6) / 3
x = 2
Thus, x = 2.
Solving for y:
Now we can solve for y by plugging in 2 for x in the first equation (x + y = 7):
(2 + y = 7) - 2
y = 5
Thus, y = 5.