Răspuns :
2x+(3-6x)=-17 <=> 2x+3-6x=-17
=> -4x+3=-17
=> -4x=-17-3
=> -4x=-20 | * -1
=> 4x=20
=> x=20/4
=> x=5
=> -4x+3=-17
=> -4x=-17-3
=> -4x=-20 | * -1
=> 4x=20
=> x=20/4
=> x=5