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

Lời giải:
a)

\(\frac{3}{4}x=1\)

\(x=1:\frac{3}{4}=1.\frac{4}{3}=\frac{4}{3}\)

b)

\(\frac{4}{7}x=\frac{9}{8}-0,125\)

\(\frac{4}{7}x=1\)

\(x=1:\frac{4}{7}\)

\(x=\frac{7}{4}\)

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

a)\(\frac{3}{4}\). x =1

             x=1:\(\frac{3}{4}\)

             x=      \(\frac{4}{3}\)

b)\(\frac{4}{7}\).x=\(\frac{9}{8}\)-0,125

\(\frac{4}{7}\).x=1,125-0,125

\(\frac{4}{7}\).x=1

         x=1:\(\frac{4}{7}\)

         x=\(\frac{7}{4}\)

CHÚC BẠN HỌC GIỎI

K MÌNH NHÉ

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

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

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

⇔(2 x ) ²+2.2 x .1+1 ²=0 ... c ,(3 x −4) ²−14(3 x −4)(6+3 x )+49(3 x +6)=16 ... ⇔9 x ²−24 x +16−126 x ²−252 x +168 x +336+147 x +294=16.

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