25%.x+ x=-1,25
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25%x+x=1,25
1/4x+x=1,25
x(1/4+1)=1,25
x. 5/4=1,25
x=1,25:5/4=1
Ta có: \(25\%x+x=1.25\)
\(\Leftrightarrow x\cdot\dfrac{5}{4}=\dfrac{5}{4}\)
hay x=1
![](https://rs.olm.vn/images/avt/0.png?1311)
6*x+7.19*x=3.558
(6+7.19)*x=3.558
13.19*x=3.558
x=3.558/13.19
=0.2697498105
tính nhanh
0,8 x 0,4 x 1,25 x 25 + 0,725 + \(\frac{0,25}{2,25\times4\times8\times25}\)
= (0,8 x 0,4) x (1,25 x 25) + 0,725 + \(\frac{0,25}{2,25\times4\times8}\)
= 0,32 x 31,25 + 0,725 + \(\frac{0,25}{2,25\times4\times8}\)
= 10 + 0,725 + \(\frac{0,25}{2,25\times4\times8}\)
= 10 + 18,725
= 28,725
Hk tốt,
k nhé
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{4}{5}x\frac{1}{20\%}+0,08=4,08\)
\(2001:25-1999:25=0,08\)
\(75x1,25=93,75\)
\(56x2,5x400=56000\)
\(1600:1,25=1280\)
\(k\)\(nha♥♥♥♥\)
![](https://rs.olm.vn/images/avt/0.png?1311)
25% nhân X+X+X nhân 1,25 =12,5
25%nhân X+X+X =12.5 chia 1,25
25% nhân X nhân 3 =10
X nhân 3 =10 chia 25%
X nhân 3 =40
X =40 chia 3
X =13,3333.....................
ttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt
![](https://rs.olm.vn/images/avt/0.png?1311)
\(-25\%x-x=1.25\)
\(-\frac{1}{4}x-x=\frac{5}{4}\)
\(\left(-\frac{1}{4}-1\right)\cdot x=\frac{5}{4}\)
\(-\frac{5}{4}\cdot x=\frac{5}{4}\)
\(x=-\frac{5}{4}:\frac{5}{4}\)
\(x=-1\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
0,29 x ( 8 x 1,25 )
= 0,29 x 10
= 2,9
0,04 x 0,1 x 25
= ( 0,04 x 25 ) x 0,1
= 1 x 0,1
= 0,1.
`@` `\text {Ans}`
`\downarrow`
`0,29 \times 8 \times 1,25`
`= 0,29 \times (8 \times 1,25)`
`= 0,29 \times 10`
`= 2,9`
_____
`0,04 \times 0,1 \times 25`
`= (0,04 \times 25) \times 0,1`
`= 1 \times 0,1`
`= 0,1`
25% x + x= -1,25
<=>125%x= -1,25
<=>x= -1
$25%x+x=-1,25\\\to 1,25x=-1,25\\\to x=-1$
Vậy x=-1