Question

A number is increased by 30, and the

result is tripled. If the answer is 141,
what was the original number?

Answer 1

The number is 17

Explanation:

Let the number be n. Increasing this by 30 results in n + 30. Tripling this result results in 3(n + 30) = 141.

Multiplying as indicated: 3n + 90 = 141, or

3n = 51

Solving for n, we get n = 51/3 = 17

Answer 2

The original number is 17.

Explanation:

`3(x+30)=141\\\\(3(x+30))/(3)=(141)/(3)\\\\x+30=47\\\\x+30-30=47-30\\\\x=17`