Answer:
![y=(3)/(2)x\ ...(i)\\\\ z=(5)/(2)x\ ...(ii)\\\\ z=x+y\ ....(iii)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/of4v1ttovtd7og1bw9llhrk1pwbf7wtfw1.png)
Explanation:
Let x be the amount of dough required for small pizza, y be the amount of dough required for medium pizza and z be the amount of dough required for large pizza.
As per the question , we have
![y=(3)/(2)x\ ...(i)\\\\ z=(5)/(2)x\ ...(ii)\\\\ z=x+y\ ....(iii)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/of4v1ttovtd7og1bw9llhrk1pwbf7wtfw1.png)
Hence, the equation for the question with the variable representing the amount of dough needed for small pizza.
![y=(3)/(2)x\ ...(i)\\\\ z=(5)/(2)x\ ...(ii)\\\\ z=x+y\ ....(iii)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/of4v1ttovtd7og1bw9llhrk1pwbf7wtfw1.png)