If each slab of butter is one cup, and you want to double a recipe that calls for 1 and 2/3 cups of butter, how many slabs of butter will you need?

Step-by-step explanation:

Let

x -----> the number of slabs of butter

y ----> the number of  cups of butter

we know that

The ratio is

so

That means-----> The number of slabs of butter must be equal to the number of cups of butter

In this problem

we have

Remember that

so

The number of slabs of butter needed must be equal to the number of cups of butter

therefore