Question

уравнение 4x/5=x-9/2

Answer 1

$frac{4x}{5} = frac{x-9}{2}$
$8x=5x-45$
$3x=45$
$X=15$

Answer 2

4x/5-x-9/2=0 8x-5x+45=0 3x+45=0 3x=-45. x=-45:3=-15