Question

Tìm x biết:

45 : (3x - 4) = 3²

Answer 1

\(45:\left(3x-4\right)=3^2\)

\(\Rightarrow3x-4=45.3^2\)

\(\Rightarrow3x-4=405\)

\(\Rightarrow3x=409\)

\(\Rightarrow x=\frac{409}{3}\)

Answer 2

45 : (3x - 4) = 3²

3x - 4 = 45 . 3²

3x - 4 = 9

3x = 3

x = 9

Answer 3

y nhầm để sửa

Answer 4

\(45:\left(3x-4\right)=3^2\)

\(\Rightarrow3x-4=45:3^2\)

\(\Rightarrow3x-4=5\)

\(\Rightarrow3x=9\)

\(\Rightarrow x=3\)

Answer 5

\(45:\left(3x-4\right)=3^2\)

\(\Rightarrow\left(3x-4\right)=45:3^2=45:9=5\)

\(\Rightarrow3x=5+4=9\)

\(\Rightarrow x=9:3=3\)

Vậy \(x=3\)