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\(x-\frac{2275}{35}=1946\)
\(x=1946+\frac{2275}{35}\)
\(x=2011\)
Vậy x = 2011
k mk nha hoang thanh loc !
x - \(\frac{2275}{35}=1946\)
x = 1946 + \(\frac{2275}{35}=2011\)
x = 2011
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left(4630-x\right).54=19980\)
\(4630-x=19980:54\)
\(4630-x=370\)
\(x=4630-370\)
\(x=4260\)
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54 x 275 + 825 x 15 + 275
=14850 + 825 x 15 + 275
=14850 + 12375+275
=14850 + 12650
=27500
477x1998-1998x427
=1998x(477-427)
=1998x50
=99900
1985:2+15:2
=(1985+15):2
=2000:2
=1000
40x113x25-20x112x50
=(40x25)x113-(20x50)x112
=1000x113-1000-112
=1000x(113-112)
=1000x1
=1000
câu 1, ??????????????
câu 2, [477-427], +[1998-1998]=50+0=50
câu 3,[1985+15]:2=2000:2=1000
câu 4, ??????????
chú thích ? là ko có cách tính nhanh
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a/ (x+1)+(x+2)+(x+3)+....+(x+50)=2275
<=> (x+x+...+x)+(1+2+3+...+50)=2275
<=> \(50x+\frac{50\left(50+1\right)}{2}=2275\)
<=> 50.x+1275=2275
<=> 50x=1000
=> x=1000:50 => x=20
b/ x04+40x=101x11
<=> 100x+4+400+x=1111
<=> 101x=707
=> x=707:101 => x=7
a, ( x + 1 ) + ( x + 2 ) + ( x + 3 ) + ... + ( x + 50 ) = 2275
x x 50 + ( 50 + 1 ) x ( 50 : 2 ) = 2257
x x 50 + 51 x 25 = 2257
x x 50 + 1275 = 2257
x x 50 = 2257 - 1275
x x 50 = 982
x = 982 : 50
x = 19,64
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\Rightarrow\)
\(\text{Ta có :}\)
\(\frac{35\cdot48\cdot47}{25\cdot54\cdot72}=\frac{7\cdot5\cdot6\cdot8\cdot47}{5\cdot5\cdot9\cdot6\cdot8\cdot7}=\frac{47}{5\cdot9}=\frac{47}{45}\)
\(\text{Chúc bạn học tốt !}\)
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1. Tính
23 x 46 = 1058
34 x 10 = 340
54 x 46 = 2484
17 x 35 = 595
19 x 30 = 570
2 Tìm X :
a) X : 11 = 35 b) X : 11 = 87 c) X - 425 = 625
X = 35 x 11 X = 87 x 11 X = 625 + 425
X = 385 X = 957 X = 1050
Vậy X = 385 Vậy X = 957 Vậy X = 1050
d) X - 103 = 99 e) X + 527 = 1892 f) X x 5 = 1085
X = 99 + 103 X = 1892 - 527 X = 1085 : 5
X = 202 X = 1365 X = 217
Vậy X = 202 Vậy X = 1365 Vậy X = 217
X - 2275 x 35 = 1946
X - 79625 = 1946
X = 1946 + 79625
X = 81571
( 4630 - X ) x 54 = 1998
4630 - X = 1998 : 54
4630 - X = 37
X = 4630 - 37
X = 4593
Học tốt nha bạn !
x - 2275 x 35 = 1946
=> x - 79625 = 1946
=> x = 1946 + 79625
=> x = 81571
(4630-x) x 54 = 1998
=> 4630 -x = 1998 : 54
=> 4630 - x = 37
=> x = 4630 - 37
=> x = 4593