Let:
x = Amount of sugar:
y = Amount of flour
The chocolate chip cookie recipe called for the ratio of sugar to flour to be 8:7, so:
[tex]\frac{x}{y}=\frac{8}{7}[/tex]If you use 48oz of sugar:
[tex]\begin{gathered} \frac{48}{y}=\frac{8}{7} \\ \text{Solving for y:} \\ y=\frac{48\cdot7}{8}=42 \end{gathered}[/tex]Therefore, you would need to use 42oz of flour