Odpowiedź:
a)
3 - ( x - 3) = x - 3
3 - x + 3 = x - 3
-x - x = -3 - 6
-2x = -9 /:(-2)
x = 9/2 = 4 1/2
spr.
L = 3 - (4 1/2 - 3) = 3 - 1 1/2 = 1 1/2
P = 4 1/2 - 3 = 1 1/2
L = P
b)
(x+3) - (3-x) = x
x + 3 - 3 + x = x
2x - x = 0
x = 0
spr.
L = (0 + 3) - (3 - 0) = 3 - 3 = 0
P = 0
L = P
c)
(2x - 1) + (1-2) = x
2x - 1 - 1 = x
2x - x = 2
x = 2
spr.
L = (2 * 2 - 1) - 1 = 4 - 1 - 1 = 2
P = 2
L = P
Szczegolowe wyjaśnienie:
