Odpowiedź:
a)
9x = 4x + 2 I-4x
9x - 4x = 2
5x = 2 /:5
x = 2/5
b)
2x = 8 - 6x
2x + 6x = 8
8x = 8 /:8
x = 1
c)
4(x + 7) = -6
4x + 28 = -6
4x = -6 - 28
4x = -34 /:4
x = -34/4 = -8 2/4 = -8 1/2
d)
7x = 8 - (x + 6)
7x = 8 - x - 6
7x + x = 2
8x = 2 /:8
x = 2/8 = 1/4
e)
(x - 7)/3 = 4 /3
x - 7 = 12
x = 12 + 7 = 19
Szczegółowe wyjaśnienie:
