Bria and matt have a total of 400 stamps matt has three times as many stamps as bria which system equation can be used to find the number of stamps bria has.

if you explain the the question more correctly i might be able to answer this better

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.