Câu 1 160(x+y)/(80x+100).100=68,376 Câu 2 160.(x+y)=4.[95,267-98.(x+2y) Rút gọn

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1. 1)$ \dfrac{160.(x+y)}{80x+100}.100 = 68,376$

   $⇔ \dfrac{160x+160y}{80x+100} =0,68376$

   $⇔ 160x+160y = 68,376+54,7008x$

   $⇔160y-105,2992x=68,376$

   2) $160.(x+y) =4.[95,267-98.(x+2y)]$

   $⇔160x+160y = 381,068 – 392x-784y$

   $⇔552x+944y=381,086$

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