Question

using substitution which number from the set {8 12 16 20} makes the equation x/4 + 2 = 5 true?

Answer 1

Let's substitute each number from the set {8, 12, 16, 20} into the equation and see which one makes it true:

For x = 8:
8/4 + 2 = 5
2 + 2 = 5
4 ≠ 5 (not true)

For x = 12:
12/4 + 2 = 5
3 + 2 = 5
5 = 5 (true)

For x = 16:
16/4 + 2 = 5
4 + 2 = 5
6 ≠ 5 (not true)

For x = 20:
20/4 + 2 = 5
5 + 2 = 5
7 ≠ 5 (not true)

Therefore, the number from the set {8, 12, 16, 20} that makes the equation x/4 + 2 = 5 true is x = 12.