Question

( )3
( )5
( )8
( )12
( )15

Answer 1

(x) 12

${\Large{{\boxed{\boxed{{\sf{}}}}}}}$

$\sf{{\Large \frac{x-3}{x+3} = \frac{3}{5} }}$

$\sf{{\Large \frac{x-3}{x+3} = \frac{3}{5}}}$$\Large{{ \begin{cases} \frac{5(x-3)}{5(x+3)} = \frac{3(x-3)}{5(x+3)} \end{cases} }}$

$\sf{{\large 5(x-3) = 3(x + 3) }}$

$\sf{{\large 5x - 15 = 3x + 9 }}$

$\sf{{\large 5x - 3x = 15 + 9 }}$

$\sf{{\large 2x = 24 }}$

$\sf{{\large x = \frac{24}{2} }}$

$\sf{{\large x = 12 }}$