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a) \(10+2x=4^5:4^3\)
\(\Leftrightarrow10+2x=4^2\)
\(\Leftrightarrow2x=6\)
\(\Leftrightarrow x=3\)
b) \(14x+54=82\)
\(\Leftrightarrow14x=28\)
\(\Leftrightarrow x=2\)
c) \(15x-133=17\)
\(\Leftrightarrow15x=150\)
\(\Leftrightarrow x=10\)
![](https://rs.olm.vn/images/avt/0.png?1311)
A, 7[x + 5] - 20 = 190
7x + 35 - 20 = 190
7x + 15 = 190
7x = 175
x = 25
B, 155 - 10[x + 1] = 55
155 - 10x - 10 = 55
-10x + 90 = 55
-10x = -35
x = 3.5
C, 6[x + 2^3] + 40 = 100
6[x + 8] + 40 = 100
6x + 48 + 40 = 100
6x + 88 = 100
6x = 1
2 x = 2
D, 15x - 133 = 17
15x = 150
x = 10
E, 90[x + 2] = 45
90x + 180 = 45
90x = -135
x = -1.5
F, 4x + 54 = 82
4x = 28
x = 7
G, 17x - 20 = 14
17x = 34
x = 2
14x + 54 = 82
175 + (30 - x) = 2001
1551- 10 (x + 1) = 55
5 . (x + 12) + 22 = 92
6 . (x + 23) + 40 = 100
![](https://rs.olm.vn/images/avt/0.png?1311)
14x + 54 = 82
14x = 28
x = 2
175 + (30 - x) = 2001
30 - x = 1826
x = 30 - 1826
x = - 1796
1551 - 10 ( x + 1 ) = 55
10(x + 1) = 1496
x + 1 = 149,6
x = 148,6
5 . (x + 12) + 22 = 92
5 . (x + 12) = 70
x + 12 = 14
x = 2
6 . (x + 23) + 40 = 100
6 . (x + 23) = 60
x + 23 = 10
x = - 13
\(14x+54=82\)
\(\Leftrightarrow14x=82-54\)
\(\Leftrightarrow14x=28\)
\(\Leftrightarrow x=2\)
Vậy \(x=2\)
\(175+\left(30-x\right)=2001\)
\(\Leftrightarrow30-x=2001-175\)
\(\Leftrightarrow30-x=1826\)
\(\Leftrightarrow x=-1796\)
Vậy \(x=-1796\)
\(1551-10\left(x+1\right)=55\)
\(\Leftrightarrow10.\left(x+1\right)=1551-55\)
\(\Leftrightarrow10.\left(x+1\right)=1496\)
\(\Leftrightarrow x+1=\frac{1496}{10}\)
\(\Leftrightarrow x=\frac{1486}{10}\)
Vậy \(x=\frac{1486}{10}\)
\(5.\left(x+12\right)+22=92\)
\(\Leftrightarrow5.\left(x+12\right)=70\)
\(\Leftrightarrow x+12=14\).
\(\Leftrightarrow x=2\)
Vậy \(x=2\)
\(6.\left(x+23\right)+40=100\)
\(\Leftrightarrow6.\left(x+23\right)=60\)
\(\Leftrightarrow x+23=10\)
\(\Leftrightarrow x=-13\)
Vậy \(x=-13\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a. 95 - 5.(x + 2) = 45
5.(x + 2) = 95 - 45
x + 2 = 50 : 5
x = 10 - 2
x = 8
b. 14x + 54 = 82
14x = 82 - 54
x = 28 : 14
x = 2
c. 15x - 133 = 17
15x = 17 + 133
x = 150 : 15
x = 10
d. 155 - 10.(x + 1) = 55
10.(x + 1) = 155 - 55
x + 1 = 100 : 10
x = 10 - 1
x = 9
![](https://rs.olm.vn/images/avt/0.png?1311)
1) 70 - 5( x - 3 ) = 45
5( x - 3 ) = 70 - 45
5( x - 3 ) = 25
x - 3 = 25 : 5
x - 3 = 5
x = 5 + 3
x = 8
2) 12 + ( 5 + x ) = 20
5 + x = 20 - 12
5 + x = 8
x = 8 - 5
x = 3
3) 130 - ( 100 + x ) = 25
100 + x = 130 - 25
100 + x = 105
x = 105 - 100
x = 5
4) 175 + ( 30 - x ) = 200
30 - x = 200 - 175
30 - x = 25
x = 30 - 25
x = 5
5) 5( x + 12 ) + 22 = 92
5( x + 12 ) = 92 - 22
5( x + 12 ) = 70
x + 12 = 70 : 5
x + 12 = 14
x = 14 - 12
x = 2
6) 95 - 5( x + 2 ) = 45
5( x + 2 ) = 95 - 45
5( x + 2 ) = 50
x + 2 = 50 : 5
x + 2 = 10
x = 10 - 2
x = 8
7) 14x + 54 = 82
14x = 82 - 54
14x = 28
x = 28 : 14
x = 2
8) 15x - 133 = 17
15x = 17 + 133
15x = 150
x = 150 : 15
x = 10
9) 155 - 10( x + 1 ) = 55
10( x + 1 ) = 155 - 55
10( x + 1 ) = 100
x + 1 = 100 : 10
x + 1 = 10
x = 10 - 1
x = 9
![](https://rs.olm.vn/images/avt/0.png?1311)
1.
15X-133=17
15X=17+133
15X=150
X=150:15
X=10
2.
14X+54=82
14X=82+54
14X=28
X=28:14
X=2
3.
17X-20=14
17X=14+20
17X=34
X=34:17
X=2
li.ke mk nhé
![](https://rs.olm.vn/images/avt/0.png?1311)
x-88+59=-88+59-54
x-88+59=-83
x-88 =-83-59
x-88. =-142
x. =-142+88
x. =-54
![](https://rs.olm.vn/images/avt/0.png?1311)
14x+54=82
14x=82-54
14x=28
x=28:14
x=2
14x= 82-54
14x=28
x=28:14
x= 2
k đúng mk nha