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
Tìm x biết:
a. x-(17-8)=5+(10-3x)
b. 25-(30+x)=x-(27-8)
c. (x-12)-15=(20-7)-(18+x)
tìm x biết,
a)x-13=-5+8
b)|x-2|=|-5|
c)25-(30+x)=x-(27-8)
d)(x-12)-15=(20-7)-(18+x)
tìm x
25-(30+x)=x-(27-8)
Tìm x:
a) x - (17 - 8) = 5 + (10 - 3x)
b) 25 - (30 +x) = x - (27 - 8)
c) (x-12) - 15 = (20 - 7) - (18 + x)
d) 9 - 25 = (7 - x) - (25 + 7)
Tìm x biết:a) 29-x/21 + 27-x/23 + 25-x/25 + 23-x/27 + 21-x/29
b)x-10/30 + x-14/43 + x-5/95 + x-148/8 = 0
tìm x
a ) 25 - ( 30 + x ) = x - ( 27 - 8 )
b ) ( x -12 ) -15 = ( 20 - 7 ) - ( 18 + x )
Tìm x, biết:
a) x-(-25+x)=13-x
b) 15-(30+x)=x-(27-l-8l)
c) (12x-43).83=4.84
tìm x
x-(17-8)=5+(10-3.x)
25-(30+x)=x-(27-8)
cho 3.x là 3 nhân x nha cá bạn
a) 25 . 8 - 12 . 5 + 272 : 17 - 8
b) 125 : 25 + 14 - 142 : 71
c) 13 . 17 - 256 : 16 + 14 :7 -1
d) 15 . 24 - 14 . 5 ( 145 : 5 - 27 )
2, Tìm X, biết:
a) 37 + x = 55
b) x - 31 = 24
c) 21 ( x - 11 ) = 21
d) 9 . ( x - 29 ) = 0
e) ( x - 1954 ) . 5 = 50
f) 30 . 60 - x = 30
