Question

If a number x is decreased by 15 and the result is multiplied by 3 to get 81, which equation correctly represents this?

Options

• 3(x − 15) = 81

• x − 15 × 3 = 81

• 3x − 15 = 81

• \[\frac{x-15}{3}=81\]

Answer 1

3(x − 15) = 81

Explanation:

First decrease x by 15 → (x − 15). Then multiply the entire result by 3 → 3(x − 15) = 81.