Question

Решите систему уравнений:{2x/3-y/2=0;{3(x-1)-9=1-y

Answer 1

2x/3 - y/2 = 0            /*6
3(x - 1) - 9 = 1 - y

4x - 3y = 0
3x - 12 = 1 - y

4x - 3y = 0
3x + y = 13  /*3

4x - 3y = 0
9x + 3y = 39
----------------------- +
13x = 39
x = 3

y = 13 - 3x = 13 - 9 = 4

Ответ
( 3; 4)