First, "the sum of a number and four" is x+4.
Three times (x+4) is 3(x+4). It's also the left side of the equation.
Second, "five times the number" is 5x.
The result will then be "decreased by two", which is 5x-2. It's also the right side of the equation.
Therefore, option (1) is the correct answer.
Hope this would help :))