Odpowiedź:
c)
1 - 3/x = 1/2
-3/x = 1/2 - 1
-3/x = -1/2 : (-3)
1/6x = 1 /*6
x = 6
d)
1/2x + 1 = 4
1/2x = 4 - 1 /*2
x = 3 * 2 = 6
121.
a)
2x - 5 - x - 3 = 8
x = 8 + 8 = 16
b)
6 - x - x/2 = 4
-x - 1/2x = 4 - 6
-1 1/2x = -2
-3/2x = -2 /*(-2/3)
x = 4/3 = 1 1/3
c)
3/4x - x - 1 = 0
-1/4x = 1 /*(-4)
x = -4
d)
1/5x + 3 = 5 - 1/2x
1/5x + 1/2x = 5 - 3
2/10x + 5/10x = 2
7/10x = 2 /*10/7
x = 2 * 10/7 = 20/7 = 2 6/7
Szczegółowe wyjaśnienie: