+0  
 
0
268
2
avatar

need some help with my homework... the sum of 3 numbers is 14. the largest is 4 times the smallest. the sum of the smallest and twice the largest is 18. what are the 3 numbers?

Guest May 7, 2017

Best Answer 

 #1
avatar+7324 
+4

s = smallest

m = middle

b = biggest

 

We can make these equations from the info given in the question:

s + m + b = 14

b = 4s

s + 2b = 18

 

Replace b with 4s in the last equation and solve for s.

s + 2(4s) = 18

s + 8s = 18

9s = 18

s = 2

 

Replace s with 2 in the second equation and solve for b.

b = 4(2)

b = 8

 

Replace s and b with 2 and 8 respectively in the first equation and solve for m.

2 + m + 8 = 14

m + 10 = 14

m = 4

hectictar  May 7, 2017
 #1
avatar+7324 
+4
Best Answer

s = smallest

m = middle

b = biggest

 

We can make these equations from the info given in the question:

s + m + b = 14

b = 4s

s + 2b = 18

 

Replace b with 4s in the last equation and solve for s.

s + 2(4s) = 18

s + 8s = 18

9s = 18

s = 2

 

Replace s with 2 in the second equation and solve for b.

b = 4(2)

b = 8

 

Replace s and b with 2 and 8 respectively in the first equation and solve for m.

2 + m + 8 = 14

m + 10 = 14

m = 4

hectictar  May 7, 2017
 #2
avatar
+1

thanks!

Guest May 7, 2017

18 Online Users

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.