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If 173x + 197y = 149 and 197x + 173y = 221, then (x, y) =(A) (3,-2) (B) (2, 1)(C) (1, -2)(D) (2, -1) |
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Answer» d) (2,-1) Step-by-step explanation: easy method is USING trial and error SUBSTITUTE the value of X and y in the equation, and find which satisfy the equation |
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