Odpowiedź :
a)
x + 7 = 12
x = 5
b)
6 = 2 - x
x = -4
c)
4(x-2) = 4
4x - 8 = 0
4x = 8
x = 2
d)
(x+1)^2 = 9
x + 1 = 3 v x + 1 = -3
x = 2 v x = -4
(można podstawić 2 lub -4 pod x)
x + 7 = 12
x = 5
b)
6 = 2 - x
x = -4
c)
4(x-2) = 4
4x - 8 = 0
4x = 8
x = 2
d)
(x+1)^2 = 9
x + 1 = 3 v x + 1 = -3
x = 2 v x = -4
(można podstawić 2 lub -4 pod x)