Question

{3х+7у=13 {8х-3у=13
Помогите пожалуйста!!!!

Answer 1

3х + 7y = 13|*3
8x - 3y = 13|*7
9x + 21y = 39
+
56x - 21y = 91
___________
65x = 130
x = 130/65
x = 2
y = (8*2 - 13)/3 = (16 - 13)/3 = 3/3 = 1
Ответ (2; 1)