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m x 95 - m x 35 - m x 55 =225
m x (95-35-55)=225
m x 5=225
m=225:5
m=45
Đáp số: m=45
tk mình nha
\(\Rightarrow\)M\(\times\)/95-35-55/=225\(\Rightarrow\)m=225\(\div\)5=45
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(x\times15+x\times13=560\times45\)
\(\Rightarrow x\times\left(15+13\right)=25200\)
\(\Rightarrow x\times28=25200\)
\(\Rightarrow x=25200:28\)
\(\Rightarrow x=900\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x\times\left(2+3+4\right)=225\\ x\times9=225\\ x=25\)
![](https://rs.olm.vn/images/avt/0.png?1311)
1225×X-225×X+170-8170= ?
Bằng bao nhiêu thì mới tim đc x bạn nhé
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\(a.\dfrac{12+x}{42}=\dfrac{35}{42}\Leftrightarrow12+x=35\Leftrightarrow x=23\)
\(b.\dfrac{25-x}{40}=\dfrac{3}{8}\Leftrightarrow\dfrac{25-x}{40}=\dfrac{15}{40}\Leftrightarrow25-x=15\Leftrightarrow x=10\)
\(c.\dfrac{13+x}{20}=\dfrac{3}{4}\Leftrightarrow\dfrac{13+x}{20}=\dfrac{15}{20}\Leftrightarrow13+x=15\Leftrightarrow x=2\)
\(d.\dfrac{23-x}{25}=\dfrac{20}{25}\Leftrightarrow23-x=20\Leftrightarrow x=3\)
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\(a,\Rightarrow x\times\left(42+54+4\right)=25400\\ \Rightarrow x\times100=25400\\ \Rightarrow x=254\\ b,\Rightarrow x\times\left(142-41-1\right)=40800\\ \Rightarrow x\times100=40800\\ \Rightarrow x=408\)
a) \(x\)(42+54+4)=15400 b) (142-41-1)\(x\)=10800
\(x\)x100=15400 100x\(x\)=10800
\(x\)=15400:100 \(x\)=10800:100
\(x\)=154 \(x\)=108
![](https://rs.olm.vn/images/avt/0.png?1311)
Xx42+Xx57+X=25400
Xx(42+57+1)=25400
Xx100=25400
X=25400:100
X=254
![](https://rs.olm.vn/images/avt/0.png?1311)
42 : X + 36 : X = 6
( 42 + 36 ) : X = 6
78 : X = 6
X = 78 : 6
X = 13
Kết bạn với mk nha !
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có
42 : x + 16 : x = 13
(42 + 16) : x = 13
78 : x = 13
x = 78 : 13
x = 6
(225 + x) : 4 = 42
225 + x = 42 x 4
225 + x = 168
x = 168 - 225
x = - 57
x=-57 nha
HT
k cho mình nha
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