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Find the value of

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To draw graph of 4x+5y=19, Find y when x = 1.

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For simultaneous equations in variables x and y, D_X = 49, D_Y = –63, D = 7, then what is x?

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To solve x + y = 3; 3x–2y – 4 = 0 by determinant method find D.

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ax + by = c and mx + ny = d and an ≠ bm then these simultaneous equations have –