Question

[Trang Nguyễn]

a,3/x=y/7

B,3x-1/-5=-5/3x-1

C,2x-5/-3=27/(2x-5)mũ2

d,y+3/-2=5/x-6

Cần gấp

Answer 1

[Nguyễn Lê Phước Thịnh]

b: \(\Leftrightarrow\left(3x-1\right)^2=25\)

\(\Leftrightarrow3x-1\in\left\{5;-5\right\}\)

hay \(x\in\left\{2;-\dfrac{4}{3}\right\}\)

c: \(\Leftrightarrow\left(2x-5\right)^3=-81\)

\(\Leftrightarrow2x-5=-3\sqrt[3]{3}\)

hay \(x=\dfrac{5-\sqrt[3]{3}}{2}\)