SOLUTION: small ones weight 3 ldb,big ones weight is 4 lb. the number of small ones is 3 more than twice the number of big ones. all together,they weight 79 lb.how many small ones are there?

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons -> SOLUTION: small ones weight 3 ldb,big ones weight is 4 lb. the number of small ones is 3 more than twice the number of big ones. all together,they weight 79 lb.how many small ones are there?      Log On


   

Question 1040192: small ones weight 3 ldb,big ones weight is 4 lb. the number of small ones is 3 more than twice the number of big ones. all together,they weight 79 lb.how many small ones are there?



Answer by jorel555(1290) About Me  (Show Source):
You can put this solution on YOUR website!
Let n equal big ones. Then small ones are 2n+3. So:
4n+3(2n+3)=79
4n+6n=70
n=7
There are 7 big ones and 17 small ones ☺☺☺