Respostas

2014-05-18T22:23:10-03:00
6b+9a-7
b=3
a=3
6.3+9.3-7
18+27-7
38
2014-05-18T22:27:20-03:00
Substitua o valor de a e b na fórmula:
6b + 9a 7
6(3) + 9(3) - 7
18 + 27 - 7
38