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

3x + y = 1 (x + 1)/3 - y/5 = 2    /*15 3x + y = 1 5(x + 1) - 3y = 30 3x + y = 1 5x + 5 - 3y = 30 3x + y = 1     /*3 5x - 3y = 25 9x + 3y = 3 5x - 3y = 25 -------------------- +  14x = 28 x = 2 y = 1 - 3x = 1 - 3*2 = 1 - 6 = - 5 Ответ ( 2 ; - 5)

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