Question

Pliiiizz
1)7x-(3+2x)=x+9

Answer 1

7x-3-2x=x+9
7x-2x-1x=9+3
4x=12
x=3

Answer 2

$7x-(3+2x)=x+9$
$6x-3-2x-9=0$
$4x-12=0$
$4x=12$
$x=12:4$
$x=3$
$Otvet:3.$