Respostas

2014-08-07T11:40:36-03:00
9 - 3 (2x - 8) + 2 (4 - 5x) = 20 - (5+ 2x)9-6x-24+8-10x=-100+40x
-6x-10x-40x=-100-90+24-8
-56x=-174
x-174/-56
x=-230