Substitute in a linear expression

Replace a variable with a given value and follow operation order.

1. After substitution, multiply before adding.
2. Work through the example. Explain how its evidence supports the answer.
3. Try a new question; use the explanation to check your thinking.

Try it together

Write or draw your own example with different numbers. Solve it, then ask a partner to check the method as well as the answer.

After substitution, multiply before adding.