7x – 8 = 713

7x = 713 + 8

7x = 721

x = 721 : 7

x = 103.

x = 713 + 8 = 721

x = 21

 7x - 8 = 713

7x = 713 + 8

7x = 721

x = 721 : 7 

x = 103

Vậy x = 103

7x - 8 = 713

7x = 713 + 8

7x = 721

x = 721 : 7

x = 103

Vậy x = 103

\(4x:17=0\)

\(4x=0.17\)

\(4x=0\)

\(x=4:0\)

\(x=0\)

4x-17=0               7x-8=713

4x=17                  7x=721

x=4.25                  x=103

\(4x:17=0\)

\(4x=0.17\)

\(4x=0\)

\(x=0:4\)

\(x=0\)

\(7x-8=713\)

\(7x=713+8\)

\(7x=721\)

\(x=721:7\)

\(x=103\)

4x:17=0

4x=0.17

4x=0

x=0:4

x=0

7x-8=713

7x=713+8

7x=721

x=721:7

x=103

8(x-3)=0

x-3=0:8

x-3=0

x=0+3

x=3

7x-8=713                          8(x-3)=0                                     4x:17=0

7x=713+8                           =>x-3=0                                     =>4x=0

7x=721                                  =.x=3                                       =>x=0

x=721:7

x=103

7x-8=713                             8(x-3)=0                      4x÷17=0

7x=713+8                              x-3=0÷8                     4x=17×0

7x=​721                                x-3=0                             4x=0

x=721÷7                             x=3+0  ;                              x=0÷4

x=103                                  x=3                                     x=0

Bài đó bằng 21 mà

a/ x=0

b/ x=705/7

c/ x=-3

0

.4x : 17 = 0 

<=> 4x = 17

<=> x = 17/4 = 4,25

7x - 8 = 713

<=> 7x = 713 + 8

<=> x = 103

8 ( x - 3 ) = 0

<=> 8x - 24 = 0

<=> 8x = 24

<=> x = 4

.

.

.

.

4x:17=0                                                  7x-8=713                                                   8(x-3)=0

4x=0.17=0                                              7x=713+8=721                                             x-3=0:8=0

x=0:4=0                                                  x=721:7=103                                               x=0+3=3

Vậy x=0                                                 Vậy x=103                                                 Vậy x=3

4x:17=0

=>4x=0

=>x=0

7x-8=713

=>7x=713+8

=>7x=721

=>x=103

8(x-3)=0

=>x-3=0

=>x=3