To solve this expression, we need to follow the order of operations, which is commonly known as PEMDAS (Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction).

Let's break down the expression step by step:

5 / 10 x 15 + 5 / 15 x 20 + 5 / 20 x 25 + 5 / 25 x 30 + 5 / 30 x 35

First, we perform the division:

0.5 x 15 + 0.3333 x 20 + 0.25 x 25 + 0.2 x 30 + 0.1667 x 35

Next, we perform the multiplication:

7.5 + 6.6666 + 6.25 + 6 + 5.8335

Finally, we add all the results together:

7.5 + 6.6666 + 6.25 + 6 + 5.8335 = 32.25

Therefore, the result of the expression is 32.25.