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Solve this system of equations. 12x − 18y = 27 4x − 6y = 10
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If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).
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2x+y=7 5x+y=9 find the system of equations...
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