55+45
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
x+45=45-45+55:55
x+45=0+1
x+45=1
x=1-45
x=-44
k nhé mk vừa k bn rùi
x + 45 = 45 - 45 + 55 : 55
x + 45 = 45 - 45 + 1
x + 45 = 0 + 1
x + 45 = 1
x = 1 - 45
x = -44
![](https://rs.olm.vn/images/avt/0.png?1311)
55+45-45+55
= 55+0+55
= 110
ung ho nha*****************
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
(55+45+15) - (15-55+45) = (100+15) - (-40+45)
= 115 - 5
=110
![](https://rs.olm.vn/images/avt/0.png?1311)
`#3107.101107`
\(45\times37+93\times45+55\times61+69\times55\)
\(=45\times\left(37+93\right)+55\times\left(61+69\right)\)
\(=45\times130+55\times130\)
\(=130\times\left(45+55\right)\)
\(=130\times100\)
\(=13000\)
\(#GNamK\)
45x37+93x45+55x61+69x55
=45x(37+93)+55x(61+69)
=45x130+55x130
=130x(45+55)
=130x100=13000
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x:2+250.4=55.61+69.55-45.37-93.45\)
\(\Leftrightarrow x:2+1000=55\left(61+69\right)-45\left(37+93\right)\)
\(\Leftrightarrow x:2+1000=55.130-45.130\)
\(\Leftrightarrow x:2+1000=130\left(55-45\right)\)
\(\Leftrightarrow x:2+1000=130.10\)
\(\Leftrightarrow x:2+1000=1300\)
\(\Leftrightarrow x:2=1300-1000=300\)
\(\Leftrightarrow x=300.2=600\)
Vậy \(x=600\)
X:2+250*4=55*61+69*55-45*37-93*45
X:2+250*4=(55*61+69*55)-(45*37+93*45)
X:2+1000=55*(61+69)-45*(37+93)
X:2+1000=55*130-45*130
X:2+1000=(55-45)*130
X:2+1000=10*130
X:2+1000=1300
X:2=1300-1000
X:2=300
X=300*2
X=600
Vậy X = 600
![](https://rs.olm.vn/images/avt/0.png?1311)
55 x 45 + 55 x 55
= 55 x ( 45 + 55 )
= 55 x 100
= 5500
\(55+45=100\)
Tổng bằng:
55+45=100
Đáp số:100