x/3+1/4-3/5=0
x/3-7/20=0
x/3=7/20
=>20x=21
x=21/20
x/3 + 1/4 - 1/5 = 0
x/3 - 7/20 = 0
x/3 = 0 + 7/20
x/3 = 7/20
Ta nhận thấy rằng 7/20 = 21/60
Vậy x/3 = 21/60
Suy ra x = 21
Đáp số : 21
a) 5/2 - x + 4/5 = 2/3 + 4/7
b) ( x - 1 ) x ( x + 2 )< 0
c) ( x + 3/5 ) x ( x+ 1 )<0
d) ( x - 1/3 ) x ( x + 2/5 )>0
2(x+1)-4x=6
3(2-x)+4(5-x)=4
7/3(x-4/3)+2/5(4-1/3x)=0
(x+1)(x-3) =0
nhanh giúp mik nha
Tìm x ,y ,z biet :
a, |x+3/4|+|y-1/5|+|x+y+z|=0
b, |3x-4|+|3y-5|=0
c,|x+3/4|+|y-2/5|+|z+1/2| <0
d, |x+1/5|+|3-y|=0
|x-3| + |y-2x | =0 |x| + 3|2x -x ² | =0 |5x ² -5 | + 4|y-7 | =0 ||x +1 | + |y-5 |=0 |x ² -1| + |y-1| =0 |x-1 | +|x ²-x |=0
( 2/5-x ) : 4/3 +1/2 =-4
( -3 +3/x -1/3 ) : (1+ 2/5 +2/3 ) =-5/4
-3x /4 .( 1/x +2/7 )=0
Tìm x
(3^2-2^3)x+3^2.2^2=4^2.3
x^5-x^3=0
(x-1)^2+(-3)^2=5^2.(-1)^100
(2x-1)^2-(2x-1)=0
1) x2019 - 1 = 0
2) x4 - 16 = 0
3) 32 - x5 = 0
4) ( x - 2 )3 = ( 1 - 3x )3
5) ( 4 - 3x )10 - ( 3 + x ) = 0
6) x2 = x
7) x6 = x3
8) ( x - 3 )5 = 4 ( x - 3 )
Các bn ơi giúp mình với, ai trả lời nhanh và đúng mìh tick cho:
Bài 1: Tìm x biết:
1) ( 3x - 2 ) . ( 2x - 2/3) = 0
2) 2/3 + 1/3 : x = 3/5
3) x + 4/2000 + x + 3/2001 + x + 2/2002 + x + 1/2003
4) x + 4/2015 + x + 3/2016 + x + 2/2017 + x + 1 + 2018 + x + 2015/2
5) ( 5 - x ) . ( 3x - 1/4 ) > 0
6) ( x + 2/3 ) . ( 1/4 - x ) > 0
7) ( x - 1 ) . ( x - 2 ) / x - 3 > 0
8) x . ( x + y + Z ) = -3; y . ( x + y + Z ) = 4; Z . ( x + y + Z ) = 3
9) xy = 9Z; yZ = 4x; xZ = 16 . y
10) xy = 2/7; yZ = 3/2; Zx = 3/7
11) 5/x + y/4 = 1/8 với x . y thuộc Z
a 2/3-1/3 (x-3/2)-1/2 (2x+1)=5
b (x+1/2). (x-3/4)=0
c 1/3.x+2/5-(x+1)=0
tìm x biết
(2/5-x) : 4/3 +1/2 =-4
(-3 +3/x - 1/3 ) : ( 1+ 2/5 2/3 ) = -5/4
-3x/4 .( 1/x +2/7 ) =0
3 - 1-1/2/1+1/x= 5/3
