a) x + 2 = 14 |-2
x=13
b) 7x + 3 = 24 |-3
7x=21 |:7
x=3
c) 7x = 2x + 5
7x-2x=5
5x=5 |:5
x=1
d) 6y + 2 = 2y + 7
6y-2y=7-2
4y=5 |:4
y=1,25
e) 3x + 4 = 2x + 7
3x-2x=7-4
x=3
f) 7y + 3 = 5y + 8
7y-5y=8-3
2y=5 |:2
y=2,5
g) 3x + 4 = 2x + 9
3x-2x=9-4
x=5
h) 3y + 1 = y + 6
3y-y=6-1
2y=5 |:2
y=2,5
i) 5x + 2 = 2x + 8
5x-2x=8-2
3x=6 |:3
x=2