Odpowiedź:
a)
3 - x = 2x + 1
-x - 2x = 1 - 3
-3x = -2 /:(-3)
x = 2/3
spr.
L = 3 - 2/3 = 2 1/3
P = 2 * 2/3 + 1 = 4/3 + 1 = 1 1/3 + 1 = 2 1/3
L = P
b)
5x - 5 = 16 - 2x
5x + 2x = 16 + 5
7x = 21 /:7
x = 3
spr.
L = 5 * 3 - 5 = 15 - 5 = 10
P = 16 - 2 * 3 = 16 - 6 = 10
L = P
Szczegółowe wyjaśnienie:
