-25 + (30-x )-x =-(27+8)
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25-(30+x)=x-(27-8)
25-30-x=x-19
(-5)-x=x-19
x+x=19+(-5)
x.2=14
x=14:2
x=7
TICK mình nha!!
25 - ( 30 + x ) = x - ( 27 - 8 )
<=> -5 - x = x - 19
=> -5 + 19 = x + x
=> 14 = 2x
=> x = 14 : 2
=> x = 7
25 - ( 30 + x ) = x - ( 27 - 8 )
25 - 30 - x = x - 27 + 8
x + x = 25 - 30 + 27 - 8
2x = 14
x = 14 : 2
x = 7
25 - (30 + x) = x - (27 - 8)
25-(30+x)=x-19
25-x=(30+x)-19
25-x=30-19+x
25-x=11+x
25-11=x+x
14=2x
x=14:2
x=7
Vậy x=7
25 - (30 + x) = x - (27 - 8)
25-(30+x)=x-21
30+x=25-x-21
30+x=25-21-x
30+x=4-x
x=4-x-30
x=-26
25 - 30 -x = x -27 + 8
-x -x =-27+8 -25 +30
-2x = -14
x= -14 : ( -2 )
x = 7
vậy x =7
Ta có :
25 - ( 30 + x ) = x - ( 27 - 8 )
25 - 30 - x = x - 27 + 8
x + x = 25 - 30 + 27 - 8
2x = 14
x = 14 : 2
x = 7
25 - ( 30 + x ) = x - ( 27 - 8 )
25 - 30 - x = x - 19
25 + (-30)-x = x - 19
-5-x = x - 19
x = -5 - ( x - 19 )
x = -5 - x + 19
x = 14 - x
x + x = 14
2x = 14
x = 14 : 2
x = 7
Vậy x = 7
25 - (30 + x) = x - (27 - 8)
25 - (30 + x) = x - 19
25 - 30 - x = x - 19
-5 - x = x - 19
-x - x = -19 + 5
-2x = -14
x = -14 : (-2)
x = 7
vậy____
25-(30+x)=x-(27-8)
=> 25-30-x=x-19
=>-5-x=x-19
=>-5+19=x+x
=>14=2x
=>x=7
a) x - (17 - 8) = 5 + (10 - 3x)
x - 17 + 8 = 5 + 10 - 3x
x + 3x = 5 + 10 + 17 - 8
4x = 24
x = 24 : 4
x = 6
b) 25 - (30 + x) = x - (27 - 8)
25 - 30 - x = x - 27 + 8
-x - x = -27 + 8 - 25 + 30
-2x = -14
x = (-14) : (-2)
x = 7
c) (x - 12) - 15 = (20 - 7) - (18 + x)
x - 12 - 15 = 20 - 7 -18 - x
x + x = 20 - 7 - 18 + 12 + 15
2x = 22
x = 22 : 2
x = 11
d) 9 - 25 = (7 - x) - (25 + 7)
9 - 25 = 7 - x - 25 - 7
x = 7 - 25 - 7 - 9 +25
x = -9
-25 + (30 - x) - x = - (27 + 8)
-25 + 30 - x - x = - 27 - 8
- x - x = - 27 - 8 + 25 - 30
-2x = -40
x = 20
-25 + (30 - x) - x = - (27 + 8)
-25 + 30 - x - x = - 27 - 8
- x - x = - 27 - 8 + 25 - 30
-2x = -40
x = 20