SOLUTION: Five Proteen Bars and 7 Superdrinks total 1915 calories. Four Proteen Bars and 3 Superdrinks total 1155 calories. How many calories does one Proteen Bar have? One Superdrink?

Algebra ->  Graphs -> SOLUTION: Five Proteen Bars and 7 Superdrinks total 1915 calories. Four Proteen Bars and 3 Superdrinks total 1155 calories. How many calories does one Proteen Bar have? One Superdrink?      Log On


   

Question 97079: Five Proteen Bars and 7 Superdrinks total 1915 calories. Four Proteen Bars and 3 Superdrinks total 1155 calories. How many calories does one Proteen Bar have? One Superdrink?
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
5P+7S=1915 MULTIPLY BY -4
4P+3S=1155 MULTIPLY BY 5 & THEN ADD
-20P-28S=-7660
20P+15S=5775
----------------------
-13S=-1885
S=-1885/-13
S=145 CALORIES FOR EACH SUPER DRINK.
5P+7*145=1915
5P+1015=1915
5P=1915-1015
5P=900
P=900/5
P=180 CALORIES FOR EACH PROTEEN BARS.