Question

If 3 times a certain number is increased by 4 the result is 28. What is the number?

If x is "the number," which of the following equations could be used to solve for the number?
3( x + 4) = 28
3 x = 4 + 28
3 x + 4 = 28

Answer 1

The number is 8.

Explanation:

Let that "certain" number be x.

3x+4=28

3x=28-4

3x=24

x=24/3

x=8