Question

$what \\is\\ the\\ value \\of \\-\frac{a}{b}\\ when \\3^{a-2b} =27 \\and\\ 9^{a+b}=3$

Answer 1

2(a+b)=1

a-2b=3

a=4/3

b=-5/6

-a/b=8/5