The ratio of boys to girls is 1:2. Two boys and two girls enter the
room and the ratio is now 5:9.
How many boys and girls were
there originally?

let the original number of boys be x

x:2x=1:2

x+2:2x+2=5:9

9x+18=10x+10

x=8

2x=16

Step-by-step explanation:

i think there was a typo. you wrote pat brings 3 quarts of ice-cream to the party. each serving of ice-cream is 1 6 quart. how many total servings of ice-cream does pat bring to the party? i think the bold is supposed to be 1/6. so 1 quart of ice cream = 6 servings. 6 * 3 = 18.