`b) 5.(x-1)+2x=4-2x`
`5x-5 +2x = 4-2x`
`5x+2x +2x = 4+5`
`9x =9`
`x=9/9=1`
`d) 4x+2(3x-1)=11-x`
`4x +6x -2 =11-x`
`4x+6x +x = 11+2`
`11x = 13`
`x=13/11`
`f) (3x-5)-(4-8x)=6+x`
`3x-5-4+8x =6+x`
`3x+8x-x = 6+5+4`
`10x = 15`
`x=15/10 = 3/2`
tìm x
a, | 5/4x - 7/2 | - | 5/8x + 3/5 | = 0
b, 21/5 + 3 : | x/4 - 2/3 | = 6
c,| 9 + x | = 2x
d, | 2x - 3 | + x = 21
e, | 7 - 2x | + 7 = 2x
f, | -x + 2/5 | + 1/2 = 3,5
G, | 3x - 4 | + 4 = 3x
Tìm STN x, biết
1) (x + 2) - 2 = 0 2) (x + 3) + 1 = 7
3) (3x - 4) + 4 = 12 4) (5x + 4) - 1 = 13
5) (4x - 8) - 3 = 5 6) 3 + (x - 5) = 7
7) 8 - (2x - 4) = 2 8) 7 + (5x + 2) = 14
9) 5 - (3x - 11) = 1 10) 16 - (8x + 2) = 6
Tìm x biet:
a,5/2x+x=32/15
b,x-7/2x=-32/15
c,-7/3x-7/4x+11/3=18/5
d,-5/6-3x=2/3
e,2x-5/9=-2/3
f,1/2-2/3x=7/12
g,7-|2x-3|=4
h,(19x+2.5^2):14=(13-8)^2-4^2
i,3/4x-2/3=2/7.1/6+5/7.1/6
k,(x+1/2).(2/3-2x)=0
l,x/2013-1/10-1/15-1/21-........-1/120=5/8
Tìm số tự nhiên x biết:
(x+2)-2=0
(x+3)+1=7
(3x-4)+4=12
(5x+4)-1=13
(4x-8)-3=5
8-(2x-4)=2
7+(5x+2)=14
5-(3x-11)=1
Giúp e vs ạ(Vui lòng trình bày ạ)
1) Tìm x biết :
a) 2x + 5 = x - 7
b) |x| = |8|
c) | 2x - 1 | = | - 13 |
d) 5x + 4 = 3x - 6
e) 4 ( x - 1 ) = 2 ( x + 2 ) = 6
f) x2 - 8x = 0
g) 2x2 + 6x = 0
h) | x + 1 | = 5
i) x + 2 | bé hơn hoặc bằng 4
k) | x - 9 | = x - 9
l) 3x - 5 = 2x + 7
m) 4x - 9 = 3x +5
n) ( 5x - 10 ) ( 6x + 1 ) = 0
tìm x
a) 7x - 5 = 16
b) 156 -2x = 82
c) 10x + 65 = 125
d) 8x + 2x = 25.2
e) 15 + 5x = 40
f) 5x + 2x = 6 -5
g) 5x + x = 150 : 2 + 3
h) 6x + 3x = 5 : 5 + 3
i) 5x + 3x = 3 : 3 . 4 + 12
j) 4x + 2x = 68 - 2 :2
k) 5x + x = 39 - 3 : 3
l) 7x - x = 5 : 5 + 3.2 - 7
m) 7x -2 x = 6 : 6 + 44 : 11
n) 0 : x = 0
o) 3x = 9
p) 4x = 64
q) 2x = 16
r) 9x - 1 = 9
s) x4 = 16
t) 2x : 2 = 1
ai nhanh mk tick cho !!!!!!!
Tìm x, biết:
a) |2x+1| = |1-x|
b) |5x-4| = |x+2|
c) |2x-3| - |3x+2| =0
d) |2+3| = |4x-3|
e) |5/4-7/2| - |5/8x+3/5| =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 )
Tìm x : a,x/7=5/3;
b,x+1/6=x-1/7;
c,5-3x/4+2x=-1/3;
d,5/11-3x=2/3x-2
e,x-11/x-3=2/3
f,-4x-3/4=1-3x/3
mong mọi người giải đáp giúp em ạ
a) (| 4 - 3x |) phần 5 = (1 phần2) phần 3
b) (x - 5x + 1) phần 2 = 3 phần 6
c) x - 2 phần 3 - x = 2x + 1 phần 5 - 2x
d) 4/5 : 7/5 = 12/5 : (x-1)
e)4x^2 = 16
