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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)
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
![](https://rs.olm.vn/images/avt/0.png?1311)
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
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\(2023\times28+2023\times34-2023\times52\)
\(=2023\times\left(28+34-52\right)\)
\(=2023\times10\)
\(=20230\)
`# \text {DNamNgV}`
`2023 \times 28 + 2023 \times 34 - 2023 \times 52`
`= 2023 \times (28 + 34 - 52)`
`= 2023 \times 10 `
`=20230`
![](https://rs.olm.vn/images/avt/0.png?1311)
2023×6+7×2023−2023
=2023×6+7×2023−2023x1
=2023×(6+7−1)
=2023×12
=24276
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\(\dfrac{2022\times2023-1}{2023\times2021+2022}\)
= \(\dfrac{\left(2021+1\right)\times2023-1}{2023\times2021+2022}\)
= \(\dfrac{2023\times2021+2023-1}{2023\times2021+2022}\)
= \(\dfrac{2023\times2021+2022}{2023\times2021+2022}\)
= 1
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![](https://rs.olm.vn/images/avt/0.png?1311)
a) 234 + 567 + 766 + 433
= (234 + 766) + (567 + 433)
= 1 000 + 1 000
= 2 000
b) 2 023 + 7 602 - 1 023 + 1 398
= (2 023 - 1 023) + (7 602 + 1 398)
= 1 000 + 9 000
= 10 000
c) 4 789 - 2 567 - 7 433 + 5 211
= (4 789 + 5 211) - (2 567 + 7 433)
= 10 000 - 10 000
= 0
c, 5 - 10 + 15 - 20 + 25 - 30 + 35 - 40 + 50 - 55 + 60 - 65 + 70
= 5 + (15 - 10) + (25 - 20) + (35 - 30) + (50 - 40) + (60 - 55) + (70 - 65)
= 5 + 5 + 5 + 5 + 10 + 5 + 5
= (5 + 5) + (5 + 5) + 10 + (5 + 5)
= 10 + 10 + 10 + 10
= 10 $\times$ 4
= 40
a, 234 + 567 + 766 + 433
= (234 + 766) + (567 + 433)
= 1000 + 1000
= 2000
b, 2023 + 7602 - 1023 + 1398
= (2023 - 1023) + (7602 + 1398)
= 1000 + 9000
= 10000
c, 4789 - 2567 - 7433 + 5211
= (4789 + 5211) - (2567 + 7433)
= 10000 - 10000
= 0
d, 5 - 10 + 15 - 20 + 25 - 30 + 35 - 40 + 50 - 55 + 60 - 65 + 70
= (70 -65) + (60 - 55) +(50 - 40) + (35 - 30) + (25 - 20) + (15 - 10) + 5
= 5 + 5 + 10 + 5 + 5 + 5 + 5
= 5 x 6 + 10
= 40
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left(1-\dfrac{1}{2}\right)\times\left(1-\dfrac{1}{3}\right)\times\left(1-\dfrac{1}{4}\right)\times...\times\left(1-\dfrac{1}{2023}\right)\\ =\dfrac{1}{2}\times\dfrac{2}{3}\times\dfrac{3}{4}\times...\times\dfrac{2022}{2023}\\ =\dfrac{1}{2023}\)
nói là chia mà
`x - 2275 : 35 = 2023 - 1732`
`x - 2275 : 35 = 291`
`x - 65 = 291`
`x = 291 + 65`
`x= 356`