y/5 (10-x)

To simplify the expression y/5(10-x), we need to apply the distributive property.

Step 1: Distribute y/5 to both terms inside the parentheses.
We get (y/5) * 10 - (y/5) * x.

Step 2: Simplify each term.
The first term becomes y * 2 and the second term becomes -y * (x/5).

Step 3: Rewrite the simplified terms.
The expression can be written as 2y - (xy/5).

In summary, the simplified expression is 2y - (xy/5).