Respostas

2014-02-10T22:38:48-02:00
3(6x-6)2x²=x²+11x-28 
18x-18.2x²=x²+11x-28
2x²+18x-x²-11x= 18-28
8x²=10
64x=10
x=64/10
x=6,4