Respostas

2014-03-06T23:30:34-03:00
X + 3a – 4 + t = 2t – 1 – a 

x + 3a -4 +1 + a = 2t – t = t 

t = x +4a - 3
2014-03-06T23:38:29-03:00
X + 3a - 4 + t = 2t - 1 - a
X + 3a - 4 + 1 + a = 2t - t = t
X + 4a - 3 = t