Mari, carlos and Amanda collect stamps. Carlos have fime more stamps than mari, and amanda has 3 times as many as carlos. Altogether, they have 100 stamps. Finde the number of stamps each person has.
There is some information missing from your question.
You say: "Carlos has fime more stamps than Mari"
I am assuming that this should read, "Carlos has five more stamps than Mari"
Let M be the number of stamps Mari has.
Let C be the number of stamps Car;ps has.
Let A be the number of stamps Amanda has.
Then,
M + C + A = 100 (Altogether, they have 100 stamps)
M + 4C = 100 (amanda has 3 times as many as carlos)
M + 4(M + 5) = 100 (Carlos has five more stamps than Mari)
5M + 20 = 100
5M = 80
M = 16, C = 21, A = 63