Question

Use substitution to determine which number(s) from the set 9, 12, 14, make the equation 6x = 72 true.

x = ?

Answer 1

Starting with the equation 6x = 72, we can substitute each number from the set {9, 12, 14} in place of x to determine which one(s) make the equation true.

1. If x = 9:
6*9 = 54 (this is not equal to 72)

2. If x = 12:
6*12 = 72 (this is equal to 72)

3. If x = 14:
6*14 = 84 (this is not equal to 72)

Therefore, the number 12 from the set {9, 12, 14} makes the equation 6x = 72 true.