SOLUTION: The sum of three numbers is forty-two. The second number is twice the first number and the third number is three less than the second number. Find the three numbers
Algebra.Com
Question 837343: The sum of three numbers is forty-two. The second number is twice the first number and the third number is three less than the second number. Find the three numbers
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
x, y, and z are the numbers.
, and
-
Any route you see or find, try.
One I see is from first equation.
, to equate expressions for z.
----- which only uses x and y.
-
One of the equations from the description also uses only x and y, so we have this simple system of two variables:
-------------------
y=2x
-------------------
x+2y=45
-------------------
A simple substitution will be best next step.
-------You have one variable's value solved.
-
Also created y=2x from the description, so
----- another variable found.
-
Given from description
------the last variable found.
RELATED QUESTIONS
Find three consecutive numbers such that the sum of the first and twice the second is... (answered by josgarithmetic)
Find three consecutive numbers such that the sum of the first and twice the second is... (answered by ewatrrr)
the sum of three integers is one hundred twenty-three. The second number is two more... (answered by ankor@dixie-net.com)
The sum of three number is 27 the second number is 1 less than the first and the third... (answered by ikleyn)
The sum of three whole numbers is 7. The second number is 1 more than the twice of the... (answered by ewatrrr)
The sum of 3 integers is 123. The second number is two more than twice the first number.... (answered by mananth,josmiceli)
the sum of three numbers is 15. The second number is two less than the first number. The... (answered by ankor@dixie-net.com,josgarithmetic,greenestamps)
The sum of three numbers is 40. The second number is twice the first number. The sum of... (answered by josgarithmetic)
The sum of the Three Numbers is 55. The second number is twice the first number, and the... (answered by rfer)