Ta có: ( 4x - 9 ) . ( 2,5 + -7/3 . x ) = 0
<=> 4x - 9 = 0
2,5 + -7/3 . x = 0
<=> 4x = 9
-7/3.x = -2,5
<=> x = 9 : 4
x = -2,5 : -7/3
<=> x = 9/4
x = 6/35
7/8 x-1/4x=9/16
x:14/5=-2,5
Bài 1: Tìm x, biết:
a) (0,75 x + 5/2) - 4/7 - (-1/3) = -5/6
b) (4 x - 9) . (2,5 + -7/3 x) = 0
Thanks
Tìm x:
a) 3/4x + 2/5x=1
b) ( x-9/11)( x-25/31)=0
c) x-3/7:9/14=7/3
Ai giúp đc k ah?!
Bài 1 : Tìm số nguyên x , biết :
a, x . ( x + 7 ) = 0
b, ( 2 + 2x ) . ( 7 - x ) = 0
c, x^3 - 4x = 0
d, ( x^2 - 9 ) . ( 3x + 15 ) = 0
e, ( 4x - 8 ) . ( x^2 + 1 ) = 0
1. Tim x
1. (x - 3 ) 100- 1 = 0
2) ( 9 - 5x ) 2019 + 1 = 0
3) ( 4x - 3 ) 5 = ( 2 - x ) 5
4 ) ( 2x - 9 ) 2 = ( 5x - 6 ) 2
5 ) (11 - 4x ) 6 - ( 2 - 5x ) 6 = 0
6) ( x- 9 ) 9 = (x - 9 ) 7
7) ( 5- 4x ) 12 = ( 5 - 4x)8
8) ( 2019 - x ) 2018 = ( 2019 - x ) 2016
9) ( x- 3 ) 3= x- 3
Các bạn giúp mình nha. Mình cảm ơn rất nhiều!
3-2 (x - 1 ) ^2=2,5
(4x^2 - 1).( 27x^3 + 8)= 0
Bài 1:
a)-2x-3.( x-17 )= 34-2.( -x+25 )
b)17x+3.( -16x-37 )= 2x+43-4x
c){-3x+2. [ 45-x-3 ( 3x+7 ) -2x]+4x} = 55
g)-103-57: [ 5.( 2x-1 )2-( -9 )0 ]
Bài 2:
a)-5.( -x+7 )-3.( -x-5 )=-4.( 12-x )+48
b)7.( -x-7 )-4.( -2x-11 )=7.( 4x+10 )+9
c)-2.( 15-3x )-4.( -7x+8 )=-5-9.( -2x+1 )
d)5.( -3x-7 )-4.( -2x-11 )=7.( 4x+10 )+9
e)4( x-2 )2-13=( -3 )2.2-11.( -3 )
f)-52-( 2x-1 )3=( -13 ).( -3 )
a . x : ( - 2 ) = 9
b. 4x + ( - 8 ) = 24
c. ( 3 - x ) . ( x + 7 ) = 0
