Question

Consider the number set: 11, 12, 13, 14

Which value of x in the number set makes the equation 3x+2x-45=20 true?
a.) 11 / b.) 12 / c.) 13 / d.) 14

Answer 1

Answer c) (13)

Explanation:

Begin with 3x+2x-45=20. Go through the steps of solving this for x.

Combining like terms, we get 5x = 65.

Dividing both sides by 5, we get x = 13.

Answer c) (13) is the correct answer/solution/root.