3a² + 6a - 5 = 3a² - a + 7
3a² + 6a - 5 - 3a² + a - 7 = 0
(3a² - 3a²) + (6a + a) + (-5 - 7) = 0
0 + 7a - 12 = 0
7a = 12
a = \(\frac{12}{7}\)
Ответ: a = \(\frac{12}{7}\)
5x - 6x + 8 = x + 6
5x - 6x - x = 6 - 8
-2x = -2
x = \(\frac{-2}{-2}\)
x = 1
Ответ: x = 1