Odpowiedź:
a)
4 * 3x - 7 = 8
12x = 8 + 7 /:12
x = 15/12 = 5/4 = 1 1/4
b)
6x - 3x + 10 = 1
3x = 1 - 10 /:3
x = -9/3 = -3
c)
8x - 3x : 2 = 10
8x - 1 1/2x = 10
6 1/2x = 10
13/2x = 10 /*2/13
x = 10 * 2/13 = 20/13 = 1 7/13
d)
2/5x + 6 - x = 9
-3/5x = 9 - 6 /*(-5/3)
x = -5/3 * 3 = -5
Szczegółowe wyjaśnienie:
