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I. ` 8x+7y = 135" "` II.` 5x+6y = 99` III.` 9y+8z= 121`A. `x lt y = z `B. ` x le y lt z `C. ` x lt y gt z `D. ` x = y gt z `

Answer» Correct Answer - D
By equation `I xx 5 - II xx 8`
`{:(40x+35y=675),(40x+48y=792),(-" "-" "-),(bar(" "-13y=-117)):}`
` rArr y = 9`
From equation I,
` 8x+7xx9 = 135`
` rArr 8x = 135 - 63 = 72`
` rArr x = 9`
From equation III,
` 9xx9+8z = 121`
` rArr 8z = 121 -81 = 40`
` rArr z = 5`
Clearly, ` x = y gt z `


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