Question

The sum of three 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

see explanation

Explanation:

the first number is x

the second number is 2x + 3

the third number is x + 2

sum the 3 numbers and equate to 45

the equation to solve for x is then

x + 2x + 3 + x + 2 = 45 ( simplify left side )

4x + 5 = 45 ( subtract 5 from both sides )

4x = 40 ( divide both sides by 4 )

x = 10

the first number is 10