## Step-by-step explanation

Problem to solve:

Learn how to solve definite integrals problems step by step online.

$\int_{3}^{8}5xdx+\int_{3}^{8}-20dx$

Learn how to solve definite integrals problems step by step online. Integrate 5x-20 from 3 to 8. The integral of a sum of two or more functions is equal to the sum of their integrals. The integral \int_{3}^{8}5xdx results in: 137.5. The integral \int_{3}^{8}-20dx results in: -160. After gathering the results of all integrals, the final answer is.