tim x;y biet

x-y=xy-1

cho x thuoc tap so nguyen biet

x^3 -x^2 -2x^2 +2x chia het cho 6

1.Tìm x thuoc N de

x^2+2x-5 chia het cho x

2.tim x thuoc N de

x^2+x=132

3.tim x,y de

x^2+xy=5

4.tim a thuoc N de

a)a+10 chia het cho a-1

b)3a-6 chia hết cho 3a

Giúp mink với mink cần giúp rồi mink tick cho nhé

tim x,y thuoc Z biet

|y|.|2x+3|=8

|2x+4|+|y-3|=0

|x-1|+|2y+7|=3

|x+5|+|2y+6| nho hon hoac bang 0

cho x,y thuoc R khac 0 thoa man 2x^2 + y^2/4 +1/x^2 = 4. tim gtnn gtln cua A= 2008+xy

tim x,y,z thuoc Z biet /2x-4/+/y+2/+/2x+3y-z/=0

a,     Tim x biet:/x-2/+/3-2x/=2x+1

b,      Tim x,y thuoc Z  biet:xy+2x-y=5

c,       tim x,y,z, biet :2x=3y;4y=5zva 4x-3y+5z=7

Tim x , y thuoc N a)x.y=24 va x<y  b) (x+3).(y-2) =45  c) (2x+1) . (y-7)=150  d)2x-xy-3y=1

a,tim x biet |x-2|+|3-2x|=2x+1

b,tim x,y thuoc Z biet xy+2x-y=5

c, tinh A=(1-1/15)(1-1/21)(1-1/28).....(1-1/210)

(x-2)(y+3)=15

(2x-1)(y-4)=-13

(3x+2)(1-y)=-7

5xy-5x+y=5

tim cap so x,y thuoc Z