Question

Sistema:
X/2 + y = 4
X + 2y = 8

Answer 1

Isole o x:
x = (4-y)*2 >> x = 8-2y
x = 8-2y
8-2y = 8-2y
8-8-2y+2y = 0
0 = 0 >> y = 0
x = 8-2y >> x = 8-0 >> x = 8