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(A): 4x + y = 7

(B): 2x - 3y = -7

2*(B) 4x - 6y = -14

Subtract from (A)

7y = 21

Divide both sides by 7: y = 3

Substitute in (A): 4x + 3 = 7

ie 4x = 4 or x = 1

Answer: x = 1 , y = 3

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