Question

\(\frac{x+5}{3}\)= \(\frac{5}{9}\)

\(\frac{x-2}{27}\)= \(\frac{3}{x-2}\)

tinh nhanh neu co the

\(\frac{3^4.2-3^6}{3^4.17+4.3^4}\)

Answer 1

\(\frac{x+5}{3}=\frac{5}{9}\)

=> ( x + 5 ) x 9 = 3 x 5

=> x + 5 = \(\frac{3\cdot5}{9}\)

=> x + 5 = \(\frac{5}{3}\)

=> x = \(\frac{-10}{3}\)

Answer 2

x+5/3=5/9   

(x+5)x3/9=5/9

(x+5)x3=5

x+5=5:3

x+5=5/3

x=5/3-5

x=-10/3

Answer 3

x+5/3=5/9

[x+5]x9=5x3

x+5=[5x3]/9

x+5=5/3

x=5/3-5=-10/3

x-2/27=3/x-2

[x-2]^2=27x3

[x-2]^2=9^2

=>x-2=9

x=9+2=11