Answer with a whiteboard (and record your steps)

Try it on this one: solve 3x + 5 = 20. Tap Board at the bottom of a post. Write a line, then tap › to start the next step. Readers go through your answer one step at a time, or tap ▶ to watch it all. This post has an answer key, so a board that ends with the right answer is checked ✓ by itself. Our answer is below.

Asked by calcali

1 answer