Jawabanmu

2014-09-13T20:35:09+07:00
10 ( 2y-10 ) = 20y-100
20y = 100
y = 50

(x+5)(5x-1) = 5x²-x+25x-5
5x²+24x-5
2014-09-13T20:35:43+07:00
20y - 20 = 5x²-x +25x-5
20 y= 5x²+24x+15