Răspuns :

=> 3(ax+2a-x-2)-4x-2=7x+3ax-2
=> 3ax+6a-3x-6-4x-2=7x+3ax-2
=> 3ax+6a-7x-8=7x+3ax-2
=> 3ax+6a-7x-7x-3ax=-2+8
=> 6a-14x=6 dar x=2
=> 6a-28=6
=> 6a=28+6
=> 6a=34
=> a=34/6
=> a=17/3