Question

решите систему уравнений:
{5а-3b=11
{3a+b=1

Answer 1

5a - 3b = 11
3a + b = 1     /*3

5a - 3b = 11
9a + 3b = 3
----------------- + 
14a = 14
a = 1

b = 1 - 3a = 1 - 3 = - 2