Respostas

2014-07-30T23:17:41-03:00
2x + 1x =22
        5
10x+1x = 22
   5
11x = 22
  5
11x = 22*5
11x = 110
x = 110
      10
x = 10°

Prova real:
2x+(1/5)x = 22
2*10 + (1/5)*10 = 22
20 + 0,2*10 = 22
22 = 22
4 2 4