tim y , x biet

( x - 1) ( 2y + 3 ) = 24

( x- 5 ) ( x + y ) = 12

( x + 1 ) ( x + 2 ) + ... + ( x +100 ) = 5750

Tim so nguyen to p de : p + 1, p + 2, p + 3 , p + 5 cung la so nguyen to

Cac ban giup minh nhe ! Hom nay minh phai di hoc roi

Bai 1:

x/y=-3/11

x/y-1=5/-194 

Bai 2:

Tim a,b la so tu nhien biết a,B nguyen to cung nhau và 5a+7b/6a+5b=28/29

Bai 3:

Lập các cáp Phan so bang nhau tu trong 6 số sau:-5,-3,-2,6,10,15

1) Tim so nguyen to P de co: 

a) P+10 va P+14 deu la so nguyen to

b) P+2 ;P+6 va P+8 deu la so nguyen to

BAI 1 : TIM TAT CA CAC SO TU NHIEN x , y SAO CHO : ( 2x + 1 ) . ( y - 5 ) = 12

BAI 2: a ) TIM SO NGUYEN x VA y, BIET : xy - x + 2y = 3

b) CO SO TU NHIEN NAO MA CHIA CHO 18 DU 12 , CON CHIA CHO 6 THI DU 2 KHONG ?

Cau 1: Co tat ca bao nhieu so co 3 chu so ma trong moi so co duy nhat 1 chu so 5.

Cau 2: Biet rang 3n+1 va 5n+4 (n thuoc N) la hai so khong nguyen to cung nhau. Khi do UCLN cua 3n+1 va 5n+4 la bao nhieu.

Cau 3: Tim cap (x;y) nguyen am thoa man:xy+3x+2y+6=0 va lxl+lyl=5.

bai 1

cho bieu thuc A = 5/n+1 voi N THUOC Z

a, de A la phan so thi n co dieu kien gi ?

b , tim tat ca cac gia tri nguyen cua n de gia tri A la 1 so nguyen ?

bai 2

cho bieu thuc M = 6/n-3 voi n thuoc Z .Co bao nhieu gia tri cua n de :

a, M ko phai la phan so

b , M la phan so va cp gia tri nguyen ?

bai 3 viet tap hop cacs so nguyen sao cho :

-12/4 < x <6/3

bai 1:tim so nguyen x sao cho gia cua cac phan so la so nguyen

a)x+3/x-2

b)x²+3x-2/x+2

chu y:dau / la dau chia trong phan so

bai 2:cho A=2n+1/n-2 voi n la so nguyen

a)tim n de a la phan so

b)tim n de A nguyen

c)tinh gia tri cua A biet:n=2;1;-2;-1

giup minh voi minh dang can.Ai dung minh tick cho