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\(43\times7+93\times43+57\times61+69\times57\)
\(=43\times\left(7+43\right)+57\times\left(61+69\right)\)
\(=43\times50+57\times130\)
\(=2150+7410\)
\(=9560\)
![](https://rs.olm.vn/images/avt/0.png?1311)
7 x 17 x 125 = (8 x 125) x 17 = 1000 x 17 = 17000
4 x 37 x 25 = (25 x 4 ) x 7 = 100 x 7 = 700
43 x 27 + 93 x 43 + 57 x 81 + 69 x 57 = 43 x (27 + 93) + 57 x (81 +69) = 43 x 120 + 57 x 120 + 57x30 = 120 x (43 + 57) + 1710 = 12000 + 1710 = 13710
![](https://rs.olm.vn/images/avt/0.png?1311)
a,12345679x45=12345679x9x5=111111111x5=555555555
b,43 x 37+93 x 43+57 x 61+69 x 57
=43x(37+93)+57(61+69)
=43 x 130+57 x 130
=130 x(43+57)
=130 x 100
=13000
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có: \(x-43=\left(57-x\right)-50\)
\(\Leftrightarrow x-43=57-x-50\)
\(\Leftrightarrow x-43-57+x+50=0\)
\(\Leftrightarrow2x-50=0\)
\(\Leftrightarrow2x=50\)
\(\Leftrightarrow x=25\)
Vậy: x=25
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x-43=\left(57-x\right)-50\)
\(x-43=57-x-50\)
\(x+x=57-50+43\)
\(2x=50\)
\(\Leftrightarrow x=25\)
x - 43 = ( 57 - x ) - 50
x - 43 = 57 - x - 50
x + x = 57 - 50 + 43
x + x = 50
2x = 50
x = 25
Vậy x = 25
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x-43=\left(57-x\right)-50\)
\(\Rightarrow x-43=57-x-50\)
\(\Rightarrow x+x=57-50+43\)
\(\Rightarrow2x=50\)
\(\Rightarrow x=25\)
Vậy x = 25
![](https://rs.olm.vn/images/avt/0.png?1311)
Bạn xem lời giải của mình nhé:
Giải:
\(x-43=57-x-50\\ x-43=\left(57-50\right)-x\\ x+x=7+43\\ 2x=50\\ x=50:2\\ x=25\)
Chúc bạn học tốt!
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![](https://rs.olm.vn/images/avt/0.png?1311)
x-43=(57-x)-50
x-43=57-x-50
x+x =57-50+43
2x =50
x =50:2
x =25
Ta có : x - 43 = ( 57 - x ) - 50
x - 43 = 57 - x - 50
x = 57 - 50 + 43 - x
x = 50 - x
x + x = 50
2x = 50
x = 50 : 2
x = 25
Vậy x = 25
1 câu ngắn gọn =25