Răspuns:
3x1+3x4+3x2=3+12+6=21/3x1+3x4+3x2=3+(1+4+2)=3x7=21. 4x1+4x3+4x2=4+12+8=24/4x1+4x3+4x2=4+(1+3+2)=4x6=24
