Решим систему:
y = 12.5x + 5;
y = 7x - 0.5;
12.5x + 5 = 7x - 0.5;
12.5x - 7x = -0.5 - 5;
5.5x = -5.5;
x = -1.
Система:
x = -1;
y = 7 * (-1) - 0.5 = -7 - 0.5 = -7.5.
Решим систему:
y = 12.5x + 5;
y = 7x - 0.5;
12.5x + 5 = 7x - 0.5;
12.5x - 7x = -0.5 - 5;
5.5x = -5.5;
x = -1.
Система:
x = -1;
y = 7 * (-1) - 0.5 = -7 - 0.5 = -7.5.