Jawabanmu

2014-04-22T19:16:18+07:00
A = -7x + 5
B = 2x - 3

A - B ?

-7x + 5 -(2x - 3) = 0
-7x + 5 -2x + 3 = 0
-9x + 8 = 0
x = 8/9

kalo memang hasilnya pecahan, ya begitu. kalo desimal jadinya 0,89
2014-04-22T19:19:18+07:00
A - B = -7x+5 - (2x-3) = -7x +5 -2x +3 = -9x +8