1. Назовите коэффициенты a, b и c линейного уравнения (ax + by + c = 0) с двумя переменными:
а) 2x - y - 1 = 0;
б) x + 3y = 0;
в) 2x - 4,5 = 0;
г) y - 3x = 5
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