If 2x + 3y : 3x + 4y = 7 : 12, అయితే, అప్పుడు  \(\dfrac{y}{x}\) దేనికి సమానం

1
\(-8\over3\)
2
\(8\over3\)
3
\(3\over8\)
4
\(-3\over8\)

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