Odpowiedź:
a) 1/2y + 3 = 7
1/2y = 7 - 3
1/2y = 4
y = 8
b) 1/7y - 5/7 = 2
1/7y = 2 + 5/7
1/7y = 19/7
y = 19
c) 1/4y + 3/4 = 7/4
1/4y = 7/4 - 3/4
1/4y = 4/4
y = 4
d) 7/9(y + 2) = 7/9
7/9y + 14/9 = 7/9
7/9y = 7/9 - 14/9
7/9y = - 7/9
y = - 1
e) 2/3(y - 1) = 2/3
2/3y - 2/3 = 2/3
2/3y = 2/3 + 2/3
2/3y = 4/3
y = 2
f) - 5/11(y - 4) = 5/11
-5/11y + 20/11 = 5/11
20/11 - 5/11 = 5/11y
15/11 = 5/11y
3 = y
