-x+2+3x=2
-x+3x+2= 2
2x+2= 2
2x= 2-2
2x= 0
x= 0/2
x= 0
-x+2+3x=2 |-2
-x+3x=0
2x=0 => x=0
SPER CA TE-AM AJUTAT!!