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` 7x + 6y + 4z = 122` ` 4x + 5y + 3z = 88`A. `x gt y`B. ` x lt y`C. ` x ge y`D. ` x le y`

Answer» Correct Answer - A
` 7x+6y + 4z = 122 …………..(1)`
` 4x+5y+3z = 88 …………….(2)`
` 9x + 2y + x = 78 ……………….(3)`
From (1) and (2) `rArr 5x -2y = 4-(a)`
From (2) and (3) ` rArr 23x+y = 146 -(b)`
From (a) and (b) ` rArr x = 6, y = 8`. Put values in eqn (3)
` rArr z = 8`


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