a, x-(17-x)=x-7

x-17+x = x-7

(x+x) - 17 = x - 7

2x - 17 = x - 7

2x - x = -7 + 17

1x = 10

x = 10

vậy_____

b, 9-25 = (7-x)-25+7

-16 = 7-x - 25 + 7

-16 = 7-x - (25-7)

-16 = 7-x - 18

-16 + 18 = 7 - x

2 = 7- x

2 - 7 = x

-5 = x

vậy____

x - ( 17 - x ) = x - 7

x - 17 + x = x - 7

x + x - x = 17 - 7

x = 10

9 - 25 = ( 7 - x ) - 25 +7

-16 = 7 - x - 25 + 7 

- 16 = 7 - 32 - x 

- 16 = -25 - x

x = - 25 - ( - 16 )

x = -9

a, x-(17-x)=x-7

x-17+x = x-7

(x+x) - 17 = x - 7

2x - 17 = x - 7

2x - x = -7 + 17

1x = 10

x = 10

x=10

b, 9-25 = (7-x)-25+7

-16 = 7-x - 25 + 7

-16 = 7-x - (25-7)

-16 = 7-x - 18

-16 + 18 = 7 - x

2 = 7- x

2 - 7 = x

-5 = x

9 – 25 = (7-x) – (25 + 7)

9 + (-25) = 7 – x – 25 – 7

-16 = 7 – x – 25 – 7

X = 7 – 7 – 25 + 16

x = -25 + 16

x = -9

Trả lời:

\(a,\)\(-9-25=\left(7-x\right)-\left(-25+7\right)\)

        \(\Leftrightarrow-34=7-x-\left(-18\right)\)

        \(\Leftrightarrow-34=7-x+18\)

        \(\Leftrightarrow-34=25-x\)

                 \(\Leftrightarrow x=59\)(Thỏa mãn \(x\inℤ\))

Vậy x = 59

\(b,\)\(x-\left(17-x\right)=x-7\)

       \(\Leftrightarrow x-17+x=x-7\)

             \(\Leftrightarrow2x-17=x-7\)

                           \(\Leftrightarrow x=10\)(Thỏa mãn\(x\inℤ\))

Vậy x = 10

Banh Bao Tong

9 - 25 = ( 7 - x ) - ( 25 + 7 )

-16     =  ( 7 - x ) - 32

-16 + 32 = 7-x

16      = 7 - x

x = 7 - 16

x = -9

nếu mk đúng k mk nha mn ủng hộ mk nhé kb đi

9-25=(7-x)-(25+7) 

(-16)=( 7-x )-32

(-16) +32=7-x

16          = 7-x

7-16       =x

-9           = x

vậy x= -9

^_^

9 - 25 = (7 - x) - (25 + 7)

- 16 = 7 - x - 32

x = 7 - 32 + 16

x = - 9

9-25=(7-x)-(25+7)

-16=(7-x)-32

=>(7-x)=32-(-16)

7-x=48

x=7-48

x=-41

-9 , ủng hộ mk nha

Ừ! Đúng là bằng -9 nhưng các bạn phải viết cả cách làm ra

Theo đầu bài ta có:
9 - 25 = ( 7 - x ) - ( 25 + 7 )
=> -16 = 7 - x - 32
=> -16 = -25 - x
=> x = ( -25 ) - ( -16 )
=> x = -9

 1) 9-25=(7-x)-(25+7)

(7-x)-(25+7)=9-25

(7-x)-(25+7)=-16

(7-x)-32=-16

7-x=-16+32

7-x=16

x=7-16

x=-9

2) (27-514) -(486-73)+x=7

 (27-514) -(486-73)+x=7

-487-413+x=7

-1011+x=7

x=7-(-1011)

x=7+1011

x=1018

3) 25+5+37-25+6-29-x=37

 25+5+37-25+6-29-x=37

67-25+6-29-x=37

42+6-29-x=37

48-29-x=37

19-x=37

x=19-37

x=-18

4) 14+(-12)+x =10-/-15/+ /-3/

14+(-12)+x =10-15+3

14+(-12)+x =-5+3

14+(-12)+x =-2

2+x=-2

x=-2-2

x=-4

1) - 9

2) 1018 

3) -18 

4) -4

tick nha

a,11-(15+21)=x-(25-9)

      11-15-21=x-25+9

               -x=-25+9-11+15+21

               -x=9

                x=-9

b,9-25=(7-x)-(25+7)

    -16=7-x-32

      x=7-32+16

     x=-9

Day dau phai toan lop 3

toan lop 3 do

25+4<x+25<25+7<x+35<4+35

nham chut