Odpowiedź:
a)
x + 17 = -2
x = -2 - 17 = -19
b)
y - 3 = -3
y = -3 + 3 = 0
c)
x + 7 = 0
x = -7
d)
y + 3 = -5
y = -5 - 3 = -8
e)
z - 1 = -1
z = -1 + 1 = 0
f)
k - 2 = 20
k = 20 + 2 = 22
g)
3y = -15 /:3
y = -5
h)
-5x = -45 /:(-5)
x = 9
i)
2x = 11 /:2
x = 11/2 = 5 1/2
j)
-3x = -10 /:(-3)
x = 10/3 = 3 1/3
Szczegółowe wyjaśnienie: