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\(x\times12,35+x\times12,65=875\)
=>X x (12,35+12,65)=875
=>X x 25 =875
=>X = 875:25=35
\(x+x\times2,7+x\times6,3=120\)
câu này tương tự như trên bạn nhé!
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x nhân 12,35+x nhân 12,56=875
x nhân (12,35+12,65) =875
x nhân 25 =875
x =875 :25
x =35
x . 12,35 + x . 12,65 = 875
x . ( 12,35 + 12,65 ) = 875
x . 25 = 875
x = 875 : 25
x = 35
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(980+y:94=8245\)
\(y:94=7265\)
\(y=7265\times94\)
\(y=682910\)
b) \(45\times y\times36=3240\)
\(45\times y=3240:36\)
\(45\times y=90\)
\(y=90:45\)
\(y=2\)
c) \(3865-y+875=1000\)
\(3865-y=125\)
\(y=3865-125\)
\(y=3740\)
d) \(4788:126\times y=1596\)
\(126\times y=4788:1596\)
\(126\times y=3\)
\(y=\dfrac{3}{126}\)
\(y=\dfrac{1}{42}\)
e) \(24624:y:9=76\)
\(y:9=24624:76\)
\(y:9=324\)
\(y=324\times9\)
\(y=2916\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x:100+x:10+x.9,89=12,35\\ x\times0,01+x\times0,1+x\times9,89\\ x\times\left(0,01+0,1+9,89\right)=12,35\\ x\times10=12,35\\ x=1,235\)
![](https://rs.olm.vn/images/avt/0.png?1311)
35 x 38 + 12,35 x 4 + 12,35 x 0,5 + 12,35 x 0,125 + 51 - 12,35 x 1,5
35 x 38 + 12,35 (4+0,5+0,125+1,5)+51
= 1330+ 12,35x6,125+51
= 1330 + 75,64375+51
=1456,64375