Jawabanmu

2014-05-01T11:12:53+07:00
(2x - 5) = x + 5
2x - x = 5 + 5
x = 10

3x - 5 = 3.10 - 5
         = 30 - 5 = 25
salah itu harusnya (2x - 2) = x +5
2x - x = 5 + 2
x = 7

3x - 5 = 3.7 - 5
= 27 - 5 = 22
itu (2x - 2) bukan (2x - 5)
sudah dibenarkan td saya keliru. .
3.7 - 5 = 21 - 5 = 16
2014-05-01T11:14:40+07:00
(2x - 2)= x + 5
2x - 2 = x + 5
2x - x = 5 + 2
x = 7

jadi
3x - 5 = .........
=3(7) - 5
= 21 - 5
= 16

jadi 3x - 5 = 16