Odpowiedź:
(x - 7) - 2(3x + 5) = 3
x - 7 - 6x - 10 = 3
-5x - 17 = 3
-5x = 3 + 17
-5x = 20 /: (-5)
x = -4
Sprawdzenie:
(-4 - 7) - 2(3 • (-4) + 5) = 3
-11 - 2(-12 + 5) = 3
-11 - 2 • (-7) = 3
-11 + 14 = 3
3 = 3
L = P
