a)17-(-x-(-x-(-x)))=-16
17-(-x-(-x+x))=-16
17-(-x-0)=-16
17-(-x)=-16
17+x=-16
x=-16-17
x=-33
vậy: x=-33
b)25-(-2+(x+(-x)))=0
25+2+0=0
25+2=0
27=0
=>x thuộc tập rỗng
c)x-(-x+(x+3).((x+3)-(x-2)))=0
x-(-x+(x+3).(x+3-x+2))=0
x-(-x+(x+3).(3+2))=0
x-(-x+(x+3).5)=0
x-(-x+5x+15)=0
x-(4x+15)=0
x-4x-15=0
1.tìm x,y biết
a, x.(y-3)≥0
b, (2.x-1).(y-1)≤0
c,(x-1).(2.k+1)≥0
2. tìm x,y ϵ Z biết
a, x(x+3)=0
b,(x-2).(5-x)=0
c,(x-1).(x^2+1)=0
d, x.y+3.x-7.y=21
e,x.y+3.x-2y=11
Tìm x∈Z, biết:
a)x.(x-6)=0
b)(-7-x).(-x+5)=0
c)(x+3).(x-7)=0
d)(x-3).(x2+12)=0
e)(x+1).(2-x) ≥0
f)(x-3).(x-5) ≤0
bài 1 tìm x
a. 5 - 3(x+4) = -1
b.(x-1) - (x+2) = 0
c.( \(\dfrac{1}{2}\) + x )-( \(\dfrac{1}{3}\) - x) = 0
d. 2x2 - 3 = 5
e. x(2x -1) = 0
g. \(\dfrac{1}{3}\) . x2 - \(\dfrac{1}{6}\)=\(\dfrac{7}{6}\)
tìm x thuộc Z
a)x.(x+5)=0
b)2x.(x+3)=0
c)(6-x).(x+10)=0
d)(5x+20).(x^2+1)=0
kẻ bảng theo ô cho mình nhé
bài 19: tìm x
c) ( 34 - 2x ) . ( 2x - 6 ) = 0
d) ( 2019 - x ) . ( 3x - 12 ) 0
e) 57 . ( 9x - 27 ) = 0
f) 25 + ( 15 - x ) = 30
g) 43 - ( 24 - x ) = 20
h) 2 . ( x - 5 ) - 17 = 25
i) 3 . ( x + 7 ) - 15 = 27
j) 15 + 4 . ( x - 2 ) = 95
k) 20 - ( x + 14 ) = 5
l) 14 + 3 . ( 5 - x ) = 27
nhanh nha, mik tick cho, ccau trình bày dễ hiểu, ko cần ''hoặc''
1. Tìm x format('truetype')%3Bfont-weight%3Anormal%3Bfont-style%3Anormal%3B%7D%3C%2Fstyle%3E%3C%2Fdefs%3E%3Ctext%20font-family%3D%22math15c341d10c5596a0fd920fda9f3%22%20font-size%3D%2216%22%20text-anchor%3D%22middle%22%20x%3D%228.5%22%20y%3D%2216%22%3E%26%23x2208%3B%3C%2Ftext%3E%3C%2Fsvg%3E)
N sao cho:
a) (x - 140) : 7 = 
- 
. 3
b) 
. 
= 
:
c) (x + 2) . (x - 4) = 0
d) format('truetype')%3Bfont-weight%3Anormal%3Bfont-style%3Anormal%3B%7D%3C%2Fstyle%3E%3C%2Fdefs%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2216%22%20text-anchor%3D%22middle%22%20x%3D%224.5%22%20y%3D%2219%22%3E3%3C%2Ftext%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2212%22%20font-style%3D%22italic%22%20text-anchor%3D%22middle%22%20x%3D%2212.5%22%20y%3D%2212%22%3Ex%3C%2Ftext%3E%3Ctext%20font-family%3D%22math1da40657c9fece7e48d30af42d3%22%20font-size%3D%2212%22%20text-anchor%3D%22middle%22%20x%3D%2222.5%22%20y%3D%2212%22%3E%26%23x2212%3B%3C%2Ftext%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2212%22%20text-anchor%3D%22middle%22%20x%3D%2231.5%22%20y%3D%2212%22%3E3%3C%2Ftext%3E%3C%2Fsvg%3E)
- 
= 2 .
2. Tìm x N sao cho:
a) 9 : (x + 2)
b) (x + 17) : (x + 3)
Giúp mình với, mình cân gấp!
1. Tìm x ∈ N sao cho:
a) (x - 140) : 7 = 33 - 23 . 3
b) x3 . x2 = 28 : 23
c) (x + 2) . (x - 4) = 0
d) 3x-3 - 32 = 2 . 32
2. Tìm x ∈ N sao cho:
a) 9 : (x + 2)
b) (x + 17) : (x + 3)
Giúp mình với, mình cân gấp!
Tìm x
a) 17- {-x - [-x -(-x)]} = -16
b) 25 - { -x + [ x + (-x)]} =0
c) x - {[-x + (x+3)] - [(x+3) - (x-2)]} =0
d) x + {(x-3) - [(x+3) - (-x - 2)]} =x
1/Tìm x ,y biết
a/(x-1)*(x-2)=-5
2/ tìm x biết
a/2*(x-1)-3*(x-2)=-5-2*(x-3)
b/x*(x-2) < 0c
c/(x-3)*(2x+6)*(3x-15)=0
