Jawabanmu

2014-08-24T11:34:38+07:00
2x +3y=5=10
4x-5y= -1
10-(-1)=11
2014-08-24T13:44:42+07:00
2x + 3y - 4x - 5y = 2x - 4x + 3y - 5y = (2-4)x + (3-5)y = -2x + -2y