Tim x,y thuoc Z biet

a.\(\frac{x+8}{y-7}=\frac{1}{3}\)và x-y=1

b.\(\frac{2x}{x-4y}=\frac{1}{y}\)

CHO E=\(\left(\frac{x^3}{x^3-4x}+\frac{6}{6-3x}+\frac{1}{2+x}\right):\left(x+2+\frac{10-x^2}{x-2}\right)\)

a) Rut gon E

b) Tim x thuoc Z sao cho E thuoc Z

  1)tim x biet 

       ​​​\(\frac{x-2}{-3}\)=\(\frac{25}{15}\)

2)tim x thuoc Z

\(\frac{x-1}{4}\) =\(\frac{8}{3}\)

3)tim x y thuoc Z biet

\(\frac{x}{7}\)=\(\frac{9}{y}\) va x>y

tim x thuoc Z biet : 2x+\(\frac{1}{7}=\frac{1}{y}\)

Tim cac so x;y thuoc z sao cho

\(\frac{1}{x}+\frac{2}{y}=2\)

Tim x,y thuoc Z biet:  \(2x+\frac{1}{7}=\frac{1}{y}\)

\(\frac{6}{x-3}+\frac{2x^2}{^{x^2}-1}+\frac{6-2x}{x^{3^{ }}-3x^2-x+3}\)         

a / Rut gon A

b/ Tim x thuoc Z de A thuoc Z

c/ Tinh gia tri cua A khi x = căn 2

1 tim x,y,z biet 

\(\frac{-4}{x}=\frac{y}{-14}=\frac{12}{21}=\frac{z}{-63}\)

2 tim n thuoc z n khac 0

a \(\frac{1111100:n}{23331:n}+\frac{-10}{-21}\)

b \(\frac{1075:n}{600:n}=\frac{43}{24}\)

TIM X, Y ,Z , BIET :\(\frac{x-2}{6}=\frac{y+3}{9}=\frac{z-7}{10}\)va \(x+y+z=106\)