Bài 1 : Tìm x,y thuộc Z :
1,( x + 1 ) . ( y - 2 ) = 0
2,( x - 5 ) . ( y - 7 ) = 1
3,( x + 4 ) . ( y - 2 ) = 2
4,( x - 4 ) . ( y + 3 ) = -3
5,( x + 3 ) . ( y - 6 ) = -4
6,( x - 8 ) . ( y + 7 ) = 5
7,( x + 7 ) . ( y - 3 ) = -6
8,( x - 6 ) . ( y + 2 ) = 7
Tìm x;y biết:
4/x + y/3=5/6
5/x - y/3=1/6
x/6 - 2/y=1/30
Tìm x;y;z biết:
a)1/2 = x-1/4 = y-2/6 = 5/2z-4
b) 1/3 = x-4/6 = y-5/12 = 7/2z-5
Tìm x và y( x,y thuộc z )
a) 5/x - y/3 = 1/6
b)x/6 - 2/y = 1/30
c)x/3 - 4/y = 1/5
Tìm x,y thuộc N biết:
1/ ( x + 1)( y + 2) = 5
2/ ( x + 1)(y + 3) = 6
3/ ( x + 2)( y + 3) = 6
4/ ( x - 1) ( y + 3) = 6
5/ ( x - 1)( y - 3) = 5
Help me!!!
tìm x;y:
(x+1)*(y+19)=1
(x+3)*(4+x)=0
y*5+8-6+x*4=18
Tìm x, y ∈ Z biết.
a) (x + 1)(y – 2) = 0
b) (x – 5)(y – 7) = 1
c) (x + 4)(y – 2) = 2
d) (x + 3)(y – 6) = -4
e) (x + 7)(5 – y) = -6
f) (12 – x)(6 – y) = -2
Tìm x, y, z, t ∈ Z biết:
a, \(\dfrac{5}{x}=\dfrac{-10}{12}\) b, \(\dfrac{4}{-6}=\dfrac{x+3}{9}\) c, \(\dfrac{x-1}{25}=\dfrac{4}{x-1}\) d, \(\dfrac{x+1}{y}=\dfrac{-3}{5}\)
e, \(\dfrac{-12}{6}=\dfrac{x}{5}=\dfrac{-y}{3}=\dfrac{Z}{-17}=\dfrac{-t}{-9}\)
h, \(\dfrac{-24}{-6}=\dfrac{x}{3}=\dfrac{4}{y^2}=\dfrac{Z^3}{-2}\)