anonymous
  • anonymous
The sum of three numbers is 12. The first number is twice the sum of the second and third. The third number is 5 less than the first. Find the number. The key is: first is 8, second is 1, third is 3 This is complicated if you have to show your work and not just guess and check. Set up the equations first.
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
There aren't really equations. You just have to use logic. Use that Logic, process of elimination.. I'm not sure what level of math you are in though
anonymous
  • anonymous
this is algebra 2
anonymous
  • anonymous
if you set up equation I know how to solve

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

anonymous
  • anonymous
You could maybe use probability. Are you learning about Cnr and Pnr?
anonymous
  • anonymous
yes I can do
anonymous
  • anonymous
I can solve you don't have to solve , you just help me set up equation
anonymous
  • anonymous
umm okay i'm not sure if this is right but
anonymous
  • anonymous
figure out how many sums of 3 DIFFERENT (whole) numbers add up to 12. so 12*11*10
anonymous
  • anonymous
so thats your total possibilities and now u can narrow it down
anonymous
  • anonymous
given the key
anonymous
  • anonymous
\[\{a+b+c=12,a=-10+2 a+2 b,c=a-5\} \]\[\{\{a\to 8,b\to 1,c\to 3\}\} \]
anonymous
  • anonymous
thankyou haha
anonymous
  • anonymous
robtobey how yu get number 10 and 5 ,
anonymous
  • anonymous
the key for check answer not the given
anonymous
  • anonymous
I'm working on a response.
anonymous
  • anonymous
I still don't get ,how you get -10?
anonymous
  • anonymous
{a + b + c = 12, a = 2 (b + c) , c = a - 5} Replace c in the first two equations with (a-5) {-5 + 2 a + b = 12, a = 2 (-5 + a + b)} Expand the second equation above by multiplying through by 2 {-5 + 2 a + b == 12, a == -10 + 2 a + 2 b} Solve the above two equations for a and b Take the value of a and plug it into c = a - 5 to obtain the value of c I hope I got this correct.
anonymous
  • anonymous
thanks
anonymous
  • anonymous
You are welcome.

Looking for something else?

Not the answer you are looking for? Search for more explanations.