Final answer:
To solve the equation, you need to use the distributive property and distribute the 5 to both terms inside the parentheses.
Step-by-step explanation:
This question is a mathematics question. To solve it, you need to use the distributive property. The distributive property states that multiplying a number by a group of numbers added together is the same as doing each multiplication separately and then adding the results together. In this case, you can distribute the 5 to both terms inside the parentheses:
5(x + y) = 5 * x + 5 * y
So, in the equation 5x + 20 = 5(x + y), the missing term inside the parentheses is y.
Learn more about Distributive property in mathematics