X -135:45=200
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài 2:
a: =>x-45=-20
hay x=25
b: =>35+30-5x=-12+112
=>65-5x=100
=>5x=-35
hay x=-7
c: =>x-124=1000
hay x=1124
d: \(\Leftrightarrow46-\left(3x-2\right)^3=-18\)
\(\Leftrightarrow\left(3x-2\right)^3=64\)
=>3x-2=4
hay x=2
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài 2:
a: =>x-45=-20
hay x=25
b: =>35+30-5x=-12+112=100
=>65-5x=100
=>5x=-35
hay x=-7
c: =>x-124=1000
hay x=1124
d: \(\Leftrightarrow46-\left(3x-2\right)^3=-18\)
\(\Leftrightarrow\left(3x-2\right)^3=64\)
=>3x-2=4
hay x=2
![](https://rs.olm.vn/images/avt/0.png?1311)
C1:
a) 135 x 54 + 45 x 135 + 135
= 135 x ( 54 + 45 + 1)
=135x100=13500
C2
a) 135 x 54 + 45 x 135 + 135
= 7290 + 6075 +135
= 13500
![](https://rs.olm.vn/images/avt/0.png?1311)
7x + 135 : 45 = 52
7x + 3 = 52
7x = 52 - 3
7x = 49
7x = 72
Vậy x = 2
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có 3x+45=150%x+135
3x+45=1,5x+135
3x-1,5x=135-45
1,5x=90
x=90:1,5
x=60
![](https://rs.olm.vn/images/avt/0.png?1311)
x + 45 - 10 = 135
x = 135 + 10 - 45
x = 145 - 45
x = 100
![](https://rs.olm.vn/images/avt/0.png?1311)
123 x 45 - 41 x 135=
=123 x 45 - 41 x 3 x 45
=123 x 45 - 123 x 45
=0
123 x 45 - 41 x 135
= 123 x 45 - 41 x 3 x 45
= 45 x ( 123 - 41 x 3)
= 45 x ( 123 - 123)
=0
![](https://rs.olm.vn/images/avt/0.png?1311)
X+(27150-135*200):5=53*128+69*128-22*128
X+150:4=12800
X+37,5=12800
X= 12800 - 37,5
X = 12762,5
X+(27150-135*200):5=53*128+69*128-22*128
X + 150 : 4 = 12800
X + 37,5 = 12800
X = 12800 - 37,5
X = 12762,5
`x-135:45=200`
`=>x-3=200`
`=>x=200+3=203`
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