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![](https://rs.olm.vn/images/avt/0.png?1311)
1 bình nước và 1 hopkeo cân nặng số g là;
(1800+2100)-1700=2200 g
1 bing nuoc va mot hop keo can nang la
(1800+2100)-1700=2200 g
d/s:2200 g
![](https://rs.olm.vn/images/avt/0.png?1311)
Số tiền Minh góp là:
2500+500x2=3500 (đồng)
Quả bóng đó giá số tiền là:
3500+2500=6000(đồng)
Trung bình cộng số tiền của 2 bạn là:
( 2500 + 500 ) : 1 = 3000 ( đồng )
Số tiền Minh góp là:
3000 + 500 = 3500 ( đồng )
Quả bóng có giá:
2500 + 3500 = 6000 ( đồng )
Đáp số:.....
![](https://rs.olm.vn/images/avt/0.png?1311)
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giúp mình ạ!!!!!!!!!!!!!!!!!!!!!!!!!!
37.c 38.c 39.c