Tim so co 2 chu so biet tong cua hai chu so do bang 11 . Neu doi vi tri hai chu so cua so phai tim thi so do tang them 45 don vi .

tim so co hai chu so biet rang neu doi cho hai chu so cua so do cho nhau ta duoc so moi hon so cu 45 don vi

luc dau so nguoi doi 1 bang 2/5 so nguoi cua doi 2 sau khi them vao moi doi 5 nguoi thi so nguoi cua doi1 bang 1/2 so nguoi cua doi 2 .Tim tong so nguoi cua 2 doi

hai doi co tat ca 270 nguoi . neu chuyen 25/100 so nguoi doi thu nhat sang doi thu 2 thi so nguoi doi thu 2 bang 80/100 so nguoi cua doi thu nhat . tim so nguoi cua doi thu nhat

Co hai doi trong cay , doi 1 trong nhieu hon doi 2 la 200 cay . Tim so cay cua moi doi biet rang neu moi doi trong them 50 cay thi so cay cua doi 2 se bang 6/7 so cay cua doi 1

nhanh nha minh cho la ************************

So doi vien cua mot lien doi chua den 1500 nhung lon hon 1000 .Moi khi xep hang 18 hang 21 hang 24 deu vua du .Tim so doi vien cua lien doi ?

Neu cach giai ?

tim so doi cua moi so : 15,10,-7

tim so nguyen x trong cac truong hop sau:

tri tuyet doi cua x+tri tuyet doi cua y=2
 

tong cua 3 so la 1019,535 tim ba so do biet rang doi dau phay cua so thu nhat sang ben phai 1 chu so ta duoc so thu hai . doi dau phay cua so thu nhat sang ben trai mot chu so ta duoc so thu ba