Aflati xstiind ca: xa+xb+xc=40si a+b+c=10; 4ax+3bx-2cx=80si4a+3b=2c+16 ; VA ROG URGENTT DAU COROANA



Răspuns :

xa+xb+xc=40 x(a+b+c)=40 x*10=40 x=4
Vezi imaginea ALINJEFF62