Odpowiedź:
a) 4x + 5x + 2 - 4 - 7x + 6
2x + 4
2(x+2)
b) 2x - 6 = 7x + 9
2x - 7x = 9 + 6
-5x = 15
x = -3
c) 2(x + 1) + 6 = 4(2 - 3x) - 4
2x + 2 +6 = 8 - 12x - 4
2x + 8 = 4 - 12x
2x + 12x = 4 - 8
14x = -4
x = [tex]-\frac{2}{7}[/tex]
d) [tex]\frac{x-2}{7} = \frac{x+4}{10} \\[/tex]
10(x - 2) = 7(x + 4)
10x - 20 = 7x + 28
10x - 7x = 28 + 20
3x = 48
x = 16
e) 6(x + 3) - 13 = 2(3x - 4) + 7
6X + 18 - 13 = 6X - 8 + 7
18 - 13 = -8 + 7
5= -1
x = 0
nie jestem pewna w "e"...
Szczegółowe wyjaśnienie:
