HOC24
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Tìm x ; y sao cho :
a) x + y = x . y = x : y
b) x - y = x . y =x : y
I'm a member of Be a buddy- a programme that helps street childen. Last month, we donated books, clothes,money to the childen in Phu Yen- a flooded area. After the last flood, they are homeless: No home, no food, no water,.. So that why we organization the donate to the childen in the flooded area to help them. That's my volunteer work. Thanks for listening.