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12000-(1500.2+1800.3+1800.2:3)
= 12000-( 4500.2:3+6900.2:3+1800.2:3)
= 12000-( 4500+6900+1800) .2:3
= 12000- 12600.2:3
= 12000-4200
= 7800
![](https://rs.olm.vn/images/avt/0.png?1311)
12 000 - ( 1 500 x 2 + 1 800 x 3 + 1 800 x 2 : 3 )
= 12 000 - ( 3 000 + 5 400 + 1 200 )
= 12 000 - 9 600
= 2 400
![](https://rs.olm.vn/images/avt/0.png?1311)
96-3(x+1)=42
3(x+1) = 96-42
3(x+1) = 54
x+1 = 54:3
x = 18-1
x = 17
Mình chỉ giúp đc bài này thôi nhé
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12000- [1500.2 +1800.3+1800.2:3]
=12000-[3000+4800+1200]
=12000-9000
=3000
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![](https://rs.olm.vn/images/avt/0.png?1311)
12000 - (1500.2 + 1800.3 + 1800.2 : 3) = 12000 - (3000 + 5400 + 3600 : 3) = 12000 - (8400 + 1200) = 12000 - 9600 = 2400
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\(12000-\left[1500.2+1800.3+\left(1800.2\right):3\right]\)
\(=12000-\left[3000+5400+3600:3\right]\)
\(=12000-\left[3000+5400+1200\right]\)
\(=12000-9600\)
\(=2400\)
![](https://rs.olm.vn/images/avt/0.png?1311)
12000 – (1500.2 + 1800.3 + 1800.2:3)
= 12 000 – (3000 + 5400 + 3600 : 3)
= 12000 – (3000 + 5400 + 1200)
= 12000 – 9600
= 2400
12000 - ( 1500 x 2 + 1800 x 3 + 1800 x 2 : 3 )
= 12000 - ( 3000 + 5400 + 1200 )
= 12000 - 9600
= 2400