Odpowiedź :
Odpowiedź:
a) 2x + 5 = 13
2x = 13 - 5
2x = 8
x = 4
b) 3x - 6 = x + 8
3x - x = 8 + 6
2x = 14
x = 7
c) 2(x + 3) = x - 9
2x + 6 = x - 9
2x - x = -9 -6
x = -15
Odpowiedź:
a) 2x + 5 = 13
2x = 13 - 5
2x = 8
x = 4
b) 3x - 6 = x + 8
3x - x = 8 + 6
2x = 14
x = 7
c) 2(x + 3) = x - 9
2x + 6 = x - 9
2x - x = -9 -6
x = -15