Problema Solution
The sum of three numbers is thirty-one. The second number is twice the first number, and the third number is 4 less than the second number. Find the three numbers.
Answer provided by our tutors
if the first number is x
we can write the second number as 2x as it is twice the second number
as the thrid number is 4 less than the second number we can write the third number as 2x-4
we can write the addition of the numbers as
x + 2x + 2x- 4 = 31
5X = 31 + 4
5x = 35
x = 7
the first number = x = 7
the second number = 2x = 14
the thrid number = 2x - 4 = 10