Answer:
b =14 bowls of CCSB soup.
a= 6 bowls of CCB soup
Explanation:
1 CCB contains = 2.5a+15a
1 CCSB contains 7b +15b
On combining 20 servings of 113c +300c of Soups.
So,
2.5a+7b = 113, (multiply by 6)...............A
15a+42b = 678 .....................1
15a+15b = 300 ....................2
Solving , 1 and 2 equation
we get
b =14 bowls of CCSB soup.
putting b value in equation A we get
a= 6 bowls of CCB soup