Question

Решите систему
:х+у=2
Х-у =0

Answer 1

х + y = 2
x - y = 0
x = y
x + x = 2
2x = 2
x = 1
y = 1
Ответ ( 1 ; 1 )

Answer 2

$left { {{x+y=2} atop {x-y=0}} right. ; oplus ominus left { {{2x=2} atop {2y=2}} right. ; left { {{x=1} atop {y=1}} right.$