3x(x-1)-2(x+2)=4(1-x)-6
3x2-3x-2x-4=4-4x-6
3x2-3x-2x+4x=4-6+4
3x2-x=2
3x2-x-2=0
3x2+x-2x-2=0
3x(x+1)-2(x+1)=0
(x+1)(3x-2)=0
x+1=0 hoặc 3x-2=0
x=1 hoặc x=2/3
4x - 1 chia hết cho 2-x
3x - 4 chia hết cho x+2
8 - 6x chia hết cho 2+3
Tìm X thuộc Z
tim x biết 3x(x-1)-2(x+2)=4(1-x)-6
giup mik voi tim x biet
1, 5-(3x+6)>-2x+1
2, -7.(x+2)-3x<6-11x
3, (x+1).(x+2)-x.(x+3)<4-x
4, 6-2x>17+(4-x)
tim x
a)0,25x - 2/3x = -1 1/6
b)3/4 + 1/4.x +x - 7/6 .x = 5/12
tim x a)2+4+6+..........+2x=210
b)(2-x)^6=(2-x)^8
c)x+(x+1)+(x+2)+..........(x+2010)=2029099
Tim x biet
A 3/2.x-2/5=1/3.x-1/4
B -51/2.x+1=3/4-7/6
C 2.x-2/3=7.x+3/2-1
D 3/2.x-2/5=1/3.x -1/4
Tinh :
1+2+2^2+2^3+...+2^100
Tim x
X : 2 +x:6 +x:12+...+x:9900 = 99
x :(1/2)+x:(1/4)+x:(1/8) +...+ x:(1/512)=511
x.(x+1)=2+4+6+....+2500.Tim x
tim x biet (1/2+1/3+1/4) :(1/6-1/x)=17/5
