Question

Tìm x:
(3x-9).12=3².2³

Answer 1

(3x - 9).12 = 3² . 2³

<=> 36x - 108 = 9 . 8

<=> 36x = 180

<=> x = 5

Answer 2

\(\left(3x-9\right).12=3^2.2^3\)

\(\Rightarrow\left(3x-9\right).12=72\)

\(\Rightarrow3x-9=72:12=6\)

\(\Rightarrow3x=6+9=15\Rightarrow x=5\)