Răspuns :
3x+3y+23=65
3x+3y=65-23
3*(x+y)=42
x+y=14
2x+2y+27=
2*(x+y)+27=
2*14+27=
28+27=55
3x+3y=65-23
3*(x+y)=42
x+y=14
2x+2y+27=
2*(x+y)+27=
2*14+27=
28+27=55
