Edson exercises in sets that are each t minutes long. He does 6 sets of push-ups, 3 sets of pull-ups, and 4 sets of sit-ups. Use an expression to represent the time it takes Edson to exercise as the sum of three different terms. Simplify the expression.
The time it takes Edson to exercise can be represented as:
6t + 3t + 4t
Simplifying the expression, we have:
13t