Odpowiedź :
Zadanie 1
f)
2(x + 6) = 28 - 2x l +2x
2x + 12 + 2x = 28 l -12
4x = 16 l :4
x = 4
g)
12x - 7 = 3x + 20 l +7
12x = 3x + 27 l -3x
9x = 27 l :9
x = 3
Zadanie 1
f)
2(x + 6) = 28 - 2x l +2x
2x + 12 + 2x = 28 l -12
4x = 16 l :4
x = 4
g)
12x - 7 = 3x + 20 l +7
12x = 3x + 27 l -3x
9x = 27 l :9
x = 3