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![](https://rs.olm.vn/images/avt/0.png?1311)
a x ( 3,5 + 12 , 5) = 396,8
a x 16 = 396,8
a = 24,8
tick mk nha linh
![](https://rs.olm.vn/images/avt/0.png?1311)
x . 3,5 + x . 12,5 = 396,8
x . (3,5 + 12,5) = 396,8
x . 16 = 396,8
x = 396,8 : 16
x = 24,8
![](https://rs.olm.vn/images/avt/0.png?1311)
TRẢ LỜI :
\(y\times\left(3,5+12,5\right)=396,8\)
\(y\times16=396,8\)
\(y=396,8:16\)
\(y=24,8\)
NHỚ K MIK NHA!
y x 3,5 + x 12,5 = 396,8
y x ( 3,5 + 12,5 ) = 396,8
y x 16 = 396,8
y = 396,8 : 16
y = 24,8
![](https://rs.olm.vn/images/avt/0.png?1311)
2:
a: x=2,4-0,4=2
b: =>2x=-1,5+0,8=-0,7
=>x=-0,35
c: =>x-16=-15
=>x=1
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a,x+3,79=15,12\)\(\Rightarrow x=15,12-3,79\)\(\Rightarrow x=11,33\)
\(b,12,1-x=5,49\)\(\Rightarrow x=12,1-5,49\Rightarrow x=6,61\)
\(c,60,45:x=1,5\)\(\Rightarrow x=60,45:1,5\Rightarrow x=40,3\)
\(d,3,5.x-1,5.x=12,5\)
\(\Rightarrow x\left(3,5-1,5\right)=12,5\)
\(\Rightarrow x.2=12,25\Rightarrow x=12,25:2=6,125\)
\(d,12,5.x-2,5.x-50=2,5.10\)
\(\Rightarrow12,5.x-2,5.x-50=25\)
\(\Rightarrow x\left(12,5-2,5\right)=25+50\)
\(\Rightarrow x.10=75\)
\(\Rightarrow x=75:10=7,5\)
a) x=11,33 b) x=6,61 c)40,3
Mình chỉ biết làm tới đó thôi. xin lỗi nha
![](https://rs.olm.vn/images/avt/0.png?1311)
A, x * 4 + x * 11 = 24.
x * (4 + 11) = 24
x * 15 = 24
x = 24 : 15
x = 1,6
Vậy x=1,6
B, 0,16 : ( x : 3,5) = 2,8
x : 3,5 = 0,16 : 2,8
x : 3,5 = 0,057142857
x = 0,057142857 * 3,5
x = 0,2
Vậy x=0,2
C, x : 12,5 = 22,5 - 1,5
x : 12,5 = 21
x = 21 * 12,5
x = 262,5
Vậy x=262,5
![](https://rs.olm.vn/images/avt/0.png?1311)
Lời giải:
$y\times 3,5=22,19$
$y=22,19:3,5=6,34$
----------
$48,3-y\times 2,8=30,716$
$y\times 2,8=48,3-30,716=17,584$
$y=17,584:2,8=6,28$
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$y:5,7-5,6=12,5$
$y:5,7=12,5+5,6=18,1$
$y=18,1\times 5,7=103,17$
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x\cdot5,25+x\cdot3,75+x=396,8\)
\(x\cdot\left(5,25+3,75+1\right)=396,8\)
\(x\cdot10=396,8\)
\(x=396,8:10\)
\(x=39,68\)
#mon
\(x\times5,25+x\times3,75+x=396,8\)
\(\Rightarrow x\times\left(5,25+3,75+1\right)=396,8\)
\(\Rightarrow x\times10=396,8\)
\(x=396,8\div10\)
\(x=39,68\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a)\(25,5+y-12,5=4.7\)
⇔\(13+y=28\)
⇔\(y=15\)
b)\(76,22-y-25,7=30+5,52\)
⇔\(50,52-y=35,52\)
⇔\(y=15\)
c)\(4,5-y+1,2=3,5\)
⇔\(5,7-y=3,5\)
⇔\(y=2,2\)
\(a,\Rightarrow10+y=28\\ \Rightarrow y=18\\ b,\Rightarrow50,52-y=35,52\\ \Rightarrow y=15\\ c,\Rightarrow5,7-y=3,5\\ \Rightarrow y=2,2\)
![](https://rs.olm.vn/images/avt/0.png?1311)
40,28 - 22,5 : 12,5 + 1,7
= 40,28 - 1,8 + 1,7
= 38,48 + 1,7
= 40,18
x=24,8 nha
Lúc chờ đợi thì mik bt cách lm rồi bn ạ , nhưng ko sao đou , mik sẽ vẫn k cho bn mak hihi