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Lời giải:
a)
\(\frac{3}{4}x=1\)
\(x=1:\frac{3}{4}=1.\frac{4}{3}=\frac{4}{3}\)
b)
\(\frac{4}{7}x=\frac{9}{8}-0,125\)
\(\frac{4}{7}x=1\)
\(x=1:\frac{4}{7}\)
\(x=\frac{7}{4}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 3/4x = 1
x = 1 : 3/4
x = 4/3
b) 4/7x = 9/8 - 0,125
4/7x = 1
x = 1 : 4/7
x = 7/4
![](https://rs.olm.vn/images/avt/0.png?1311)
b)
ĐKXĐ: \(x\ne-\dfrac{3}{2}\)
Để phân số \(B=\dfrac{4x+1}{2x+3}\) là số nguyên thì \(4x+1⋮2x+3\)
\(\Leftrightarrow4x+6-5⋮2x+3\)
mà \(4x+6⋮2x+3\)
nên \(-5⋮2x+3\)
\(\Leftrightarrow2x+3\inƯ\left(-5\right)\)
\(\Leftrightarrow2x+3\in\left\{1;-1;5;-5\right\}\)
\(\Leftrightarrow2x\in\left\{-2;-4;2;-8\right\}\)
hay \(x\in\left\{-1;-2;1;-4\right\}\)(thỏa ĐK)
Vậy: \(x\in\left\{-1;-2;1;-4\right\}\)
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Mik ko ghi đề
Câu a)x=41×13 x=533
Câu b)x=1428:14 x=102
Câu c)4x=0×17
4x=0
x=0+4
x=4Mik mỏi tay ko viết nữa sorry
![](https://rs.olm.vn/images/avt/0.png?1311)
a)x:13=41
x=41.13
x=533
Vậy x=533
b)1428:x=14
x=1428:14
x=102
Vậy x=102
c)4x:17=0
4x=0.17
x=0:4
x=0
Vậy x=0
d)7x-8=713
7x=713+8
7x=721
x=721:7
x=103
Vậy x=103
![](https://rs.olm.vn/images/avt/0.png?1311)
a, x : 13 = 41
=> x = 41 x 13
=> x = 533
b, 1428 : x = 14
=> x = 1428 : 14
=> x = 102
c, 4x : 17 = 0
=> 4x = 0 x 17
=> x = 0 : 4
=> x = 0
d, 7x - 8 = 713
=> 7x = 713 + 8
=> x = 721 :7
=> x = 103
e, 8( x - 3 ) = 0
( x - 3 ) = 8 : 0
x - 3 = 0
x = 0 + 3
x = 3
g, 0 : x = 0
=> x = 0 : 0
=> x = 0
a, x : 13 = 41
=> x = 41 x 13
=> x = 533
b, 1428 : x = 14
=> x = 1428 : 14
=> x = 102
c, 4x : 17 = 0
=> 4x = 0 x 17
=> x = 0 : 4
=> x = 0
d, 7x - 8 = 713
=> 7x = 713 + 8
=> x = 721 :7
=> x = 103
e, 8( x - 3 ) = 0
( x - 3 ) = 8 : 0
x - 3 = 0
x = 0 + 3
x = 3
g, 0 : x = 0
=> x = 0 : 0
=> x = 0
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(\left(3\frac{1}{2}-2.x\right).3\frac{1}{3}=7\frac{1}{3}\)
\(3\frac{1}{2}-2.x=7\frac{1}{3}:3\frac{1}{3}\)
\(\frac{7}{2}-2.x=\frac{11}{5}\)
\(2x=\frac{7}{2}-\frac{11}{5}\)
\(2x=\frac{13}{10}\)
\(x=\frac{13}{10}:2\)
\(x=\frac{13}{20}\)
a/
3/4 . x = 1
=> x= 1: 3/4 = 4/3
b/
4/7 .x = 9/8 -0,125 = 9/8 -1/8 = 1
=> x= 1 : 4/7 = 7/4
a/ 3/4x=1
x=1:3/4
x=4/3
b/ 4/7x=9/8-0,125
4/7x=1
x=1:4/7
x=7/4