Jawabanmu

2014-04-22T18:44:03+07:00
1240 + 20n = 15(69 + n)
1240 + 20n = 1035 + 15n
20n - 15n = 1035 - 1240
5n = -205
n = -41
1 5 1
2014-04-22T18:45:45+07:00
Tuh jawabannya -41, kalo ada yg salah tolong dikoreksi
1 5 1