Question

5х-2у=0 и х+2у=12 помогите срочно нужно 

Answer 1

x=12-2y

5(12-2y)-2y=0

60-10y-2y=0

12y=60

y=5

x=12-2*5=12-10=2

Ответ: (2; 5)

Answer 2

$left { {{5x-2y=0} atop { x+2y=12}} right. left { {{x=12-2y} atop {5(12-2y)-2y=0}} right. left { {{x=12-2y} atop {60-10y-2y=0}} right. left { {{x=12-2y} atop {-12y=-60}} right.left { {{x=2} atop {y=5}} right.$

Ответ:(2,5)