SOLUTION: Solve in terms of X. The sum of three numbers is 75. The second number is 8 more than the first. I keep trying to set this up as follow: Let 1st number= X Let 2nd number= X

Algebra.Com
Question 52246: Solve in terms of X. The sum of three numbers is 75. The second number is 8 more than the first.
I keep trying to set this up as follow:
Let 1st number= X
Let 2nd number= X + 8
Let 3rd number= 75-x-(x+8)
When I set it up as x+x+8+75-x-(x+8)=75 I am unable to come up with the value of X. Help please. Thanks

Answer by rchill(405)   (Show Source): You can put this solution on YOUR website!
We know nothing about the third number, so let's call it y. So, we have which simplifies to . Further simplification results in . Continue solving for x and we get and finally.
RELATED QUESTIONS

Can you please help me? I am trying to help my daughter with 8th grade algebra. Her... (answered by Earlsdon)
The sum of three numbers is 75. The second number is 5 more than the first, and the... (answered by josgarithmetic)
A second number is five times a first number. A third number is 100 more than the first... (answered by Earlsdon)
a second number is one more than the first number. The sum of twice the first number and... (answered by TimothyLamb)
The sum of three numbers is 116. The first is 8 more than the second. The third number is (answered by solver91311)
The sum of three numbers is 147. The second number is 4 more than two times the first... (answered by josmiceli,checkley77)
the sum of three numbers is 85. The second number is 8 times the first, while the third... (answered by rfer)
The sum of three number is 75. The second is 5 more than the first, and the third is... (answered by checkley77)
I'm having trouble on how to figure this out. I don't know how to set this up as an... (answered by ankor@dixie-net.com)