Система: 2х+2y=48
4x+2y-6*2=64

2x = 48 - 2y; x = 24 - y; 4(24 - y) +2y -6*2 =64;  96 - 4y +2y -12 = 64; 84 - 2y = 64; 20 = 2y; y = 10 x = 24 - 10 = 14