Answer:
Step-by-step explanation:
Convert the mixed numbers to improper fractions: 12 3/6 = 75/6
14 4/6 = 88/6
12 3/6 + 14 4/6 = 75/6 + 88/6 = 163/6 = 27⅙
Answer: x = 0; x=10
Hope this helps!
72 yellow balls
80% of 90 is (0.80*90) = 72 yellow balls.