________________
8x+12y=116
3x+12y=66.
________________
8x-3x+12y-12y=116-66
3x+12y=66
________________
5x=50
3x+12y=66
________________
x=10
30+12y=66
________________
x=10
12y=36
________________
x=10(vaci)
y=3(oi)
P.S: Faci imainte de ecuatii sistem deoarece e un sistem, dar nu il puteam face altfel la telefon scz.