Odpowiedź:
Szczegółowe wyjaśnienie:
a)
2(x + 4) + 6x = 8
2x + 8 + 6x = 8
8x + 8 = 8 | -8
8x = 0
x = 0
b)
5x - 2(x + 4) = 10
5x - 2x - 8 = 10
3x - 8 = 10 | + 8
3x = 18 | : 3
x = 6
c)
-4 + 4 (2 - 5x) = -9
-4 + 8 - 20x = -9
4 - 20x = -9 | -4
-20x = - 13 | : (-20)
x = [tex]\frac{13}{20}[/tex]
x = 0.65
