49 x X + 55 x X - X x 4=178,6+121,4
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\(49\times x+55\times x-x\times4=178,6+121,4\)
\(\Rightarrow x\times\left(49+55-4\right)=300\)
\(\Rightarrow x\times100=300\)
\(\Rightarrow x=300:100\)
\(\Rightarrow x=3\)
Vậy \(x=3\)
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49 x X + 55 x X - X x 4 = 300
X x (49 + 55 - 4) = 300
X x 100 = 300
X = 300 : 100
X = 3
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
X+78*X+25*X+X*4=78,6+121,4
X*1+78*X+25*X+X*4=200
X*(1+78+25+4)=200
X*108=200
X=200/108
![](https://rs.olm.vn/images/avt/0.png?1311)
x + 78*x + 25*x + x*4=78,6 + 121,4
x*(1+78+25-4)=200
x* 100 =200
x = 200:100
x = 2
\(x+78\times x+25\times x-4\times x=78,6+121,4\)
\(\Rightarrow x\times\left(1+78+25-4\right)=200\)
\(\Rightarrow x\times100=200\)
\(\Rightarrow x=200\div100\)
\(\Rightarrow x=2\)
Vậy x=2
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x\) + 78 x \(x\)+ 25 x \(x\)- \(x\)x 4 = 78,6 + 121,4
\(x\)x 1 + 78 x \(x\)+ 25 x \(x\)- \(x\)x 4 = 200
\(x\)x ( 1 + 78 + 25 - 4 ) = 200
\(x\)x 100 = 200
\(x\)= 200 : 100
\(x\)= 2
X + 78 * X + 25 * X - X * 4 = 78,6 + 121,4
X * ( 1 + 78 + 25 - 4 ) = 200
X * 100 = 200
X = 200 : 100
X = 2
Vậy X = 2
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
x + 78x + 25x - 4x = 78,6 + 121,4
100x = 200
x = 200 : 100
x = 2
\(49.x+55.x-x.4=178,6+121,4\)
\(\Rightarrow x\left(49+55-4\right)=300\)
\(\Rightarrow x100=300\)
\(\Rightarrow x=300:100=3\)
vậy x = 3