Решите систему уравнений
3х + у = 1
(х + 1)/3 - у/5 = 2

3x + y = 1(x + 1)/3 - y/5 = 2    /*153x + y = 15(x + 1) - 3y = 303x + y = 15x + 5 - 3y = 303x + y = 1     /*35x - 3y = 259x + 3y = 35x - 3y = 25-------------------- + 14x = 28x = 2y = 1 - 3x = 1 - 3*2 = 1 - 6 = - 5Ответ( 2 ; - 5)