If $4x + 5y = 83$ and $\frac{3x}{2y} = \frac{21}{22}$,then $y - x = ?$

  • A
    $3$
  • B
    $4$
  • C
    $7$
  • D
    $11$

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$1 \frac{7}{9} + 3 \frac{5}{8} - 2 \frac{1}{18} + 4 \frac{7}{16} - 9 \frac{5}{18} + ? = 0$

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