\(\frac{3x-y}{x+y}\)=\(\frac{3}{4}\).tim gia tri cua ti so \(\frac{x}{y}\)

1 câu trả lời

(3x-y)/(x+y)=3/4

=>4(3x-y)=3(x+y)

=>12x-4y=3x+3y

=>9x=7y

=>x/y=7/9