Question

Make sense of problems. Determine the number , and explain how you came up with he solution

Answer 1

5

Explanation:

work backwards. Start with 20. minus 5 equals 15. Divide by 3 is 5.

double-check by going the other way.

5x3=15

15+5=20

Answer 2

5

Explanation:

because 5x3=15

15 + 5 = 20