Odpowiedź:
b)
(2x - 3)/4 = 1/2 + x
1/2x - 3/4 = 1/2 + x
1/2x - x = 1/2 + 3/4
-1/2x = 2/4 + 3/4 /*(-2)
x = -2 * 5/4 = -5/2 = -2 1/2
c)
(x + 2)/9 + (x - 1)/3 = 1
1/9x + 2/9 + 1/3x - 1/3 = 1
1/9x - 3/9x = 1 - 2/9 - 3/9
-2/9x = 4/9 /*(-9/2)
x = -9/2 * 4/9 = -2
d)
(2x + 3)/5 = (2 - x)/3 + x
2/5x + 3/5 = 2/3 - 1/3x + x
2/5x - 2/3x = 2/3 - 3/5
6/15x - 10/15x = 10/15 - 9/15
-4/15x = 1/15 /*(-15/4)
x = -15/4 * 1/15 = -1/4
e)
(3x - 5)/2 - (5x - 1)/10 = 0
3/2x - 5/2 - 1/2x + 1/10 = 0
x = 2 1/2 - 1/10 = 2 5/10 - 1/10 = 2 4/10 = 2 2/5
Szczegółowe wyjaśnienie:
