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748: x-31,72=13,6
748: x=13,6+31,72
748: x=45,32
x=748:45,32=16,50485............
ta có:
748 : X - 31,72 = 13,6
748 : X = 13,6 + 31,72
748 : X = 45,32
X = 748 : 45,32
X = bao nhiêu tự tính
tk cho mk nha
![](https://rs.olm.vn/images/avt/0.png?1311)
a ) 36 * x + 12 ,67 = 489,67
36 * x = 489,67 - 12,67
36 * x = 477
x = 477 : 36 = 13,25
b ) x * 326,63 = 245,37
x = 245,37 : 326,63 = 0,7512169733....
c ) 29,5 * ( x + 10 ,25 ) = 376,125
x + 10 ,25 = 376,125 : 29,5
x + 10 ,25 = 12,75
x = 12,75 - 10,25 = 2,5
d ) 748 : (x - 31,72) = 13,6
x - 31,72 = 748 : 13,6
x - 31,72 = 55
x = 55 + 31,72 = 86,72
a, 36 * x + 12,67 = 489,67
36 * x = 489,67 - 12,67 = 477
x = 477 : 36 = 13,25
b, x * 326,63 = 245,37
x = 245,37 : 326,63 = 0,75
c, 29,5 * (x + 10,25) = 376,125
x + 10,25 = 376,125 : 29,5 = 12,75
x = 12,75 - 10,25 = 2,5
d, 748 : ( x - 31,72 ) = 13 ,6
( x - 31,72 ) = 748 : 13,6 = 55
x = 55 + 31,72 = 86,72
![](https://rs.olm.vn/images/avt/0.png?1311)
29,5 x ( x + 10,25 ) = 376,125
=> x + 10,25 = 376,125 : 29,5
=> x + 10,25 = 12,75
=> x = 12,75 - 10,25
=> x = 2,5
748 : ( x - 31,72) = 13,6
=> x - 31,72 = 748 : 13,6
=> x - 31,72 = 55
=> x = 55 + 31,72
=> x = 86,72
\(29,5\left(x+10,25\right)=376,125\)
\(29,5x+302,375=376,125\)
\(29,5x=376,125-302,375\)
\(29,5x=y\)(y tự tìm)
\(x=\frac{y}{29,5}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x\cdot1,5-5,61=6,45\)
\(x\cdot1,5=12,06\)
\(x=8,04\)
\(89:x+51,5:x=62,5\)
\(\left(89+51,5\right):x=62,5\)
\(140,5:x=62,5\)
\(x=2,248\)
![](https://rs.olm.vn/images/avt/0.png?1311)
x * 25,6 = 128
x = 128 / 25,6 = 5
17,8 * x = 360,05 - 93,05
17,8 * x = 267
x = 267/17,8 = 15
29,5 * ( x + 10,25 ) = 376,125
x + 10,25 = 376,125/29,5
x + 10,25 = 12,75
x = 12,75 - 10,25 = 2,5
748 / ( x - 31,72 ) = 13,6
x - 31,72 = 748 - 13,6
x - 31,72 = 55
x = 55 + 31,72 = 86,72
![](https://rs.olm.vn/images/avt/0.png?1311)
a.(12,3-4,5):x=15
7,8:x=15
x=7,8:15=0,52
b.x-31,72=7,48:13,6
x-31,72=0,55
x=0,55+31,72=32,27
a.12,3:x-4,5:x=15
=>(12,3-4,5):x=15
=>7.8:x=15
=>x=7.8:15
=>x=0.52
b.7,48:9x-31,72)=13,6
=>x-31,72=7.48:13,6
=>x-31,72=0,55
=>x=0,55+31.72=32,27
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\text{7,48:(y-31,72)=13,6 }\)
\(=>y-31,72=7,48:13,6\)
\(=>y=0,55+31,72=32,27\)
7,48 : ( y - 31,72 ) = 13,6
y - 31,72 = 7,48 : 13,6
y - 31,72 = 0,55
y = 0,55 + 31,72
y = 32,27
![](https://rs.olm.vn/images/avt/0.png?1311)
17,8 x X = 360,05 - 93,05
17,8 x X = 267
X = 267 : 17,8
X = 15
29,5 x ( X + 10,25 ) = 376,125
X + 10,25 = 376,125 : 29,5
X + 10,25 = 12,75
X = 12,75 - 10,25
X = 2,5
748 : ( X - 31,72 ) = 13,6
X - 31,72 = 748 : 13,6
X - 31,72 = 55
X = 55 + 31,72
X = 86 , 72
207 : 31,6 = 6,55063291139
17,8 . x = 360,05 - 93,05
17,8 . x = 267
x = 267 : 17,8
x = 15
29,5 . (x + 10,25) = 376,125
(x + 10,25) = 376,125 : 29,5
x + 10,25 = 12,75
x = 12,75 - 10,25
x = 2,5
748 : (x - 31,72) = 13,6
(x - 31,72) = 748 : 13,6
x - 31,72 = 55
x = 55 + 31,72
x = 86,72
207 : 31,6 = 6,55063291139
Học tốt!!!
748:(x-31,72)=13,6
x-31,72=748:13,6
x-31,72=55
x=55+31,72
x=86,72
vậy x=86,72
k mk nha
748:(x-31,72)=13,6
x-31,72=748:13,6
x-31,72=55
x=55+31,72
x=82,72