Answer:
1. x = 5 2. y = 4 3. x = -2
Explanation:
2x - y = 9 -5x + 2y = 13 3x + 4y = -6
4x + y = 21 5x + y = -1 7x(-1) + 4y(-1) = -14(-1) <(multiply all by -1)
6x = 30 3y = 12 -4x = 8
6 6 3 3 4 4
x = 5 y = 4 x = -2
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