Question

The sum of three numbers is 45. The second of the three numbers is three more than twice the first number, x. The third number is two more than the first number, x. Which equation can be used to solve for the first number, x?

Answer 1

This would be the equation x + 2x + 3 + x + 2 = 45 and the answer is 10 or x=10

Answer 2

Equation would be: x + 2x + 3 + x + 2 = 45

So,4x + 5 = 45

Now, Solving:
4x = 45 - 5
x = 40 / 4
x = 10

In short, Your First number would be: 10 & Equation is 4x + 5 = 45

Hope this helps!