Question

por favor me ajudam!

resolva as equações
a) 9 elevado 2x-1=1

b) 6.7elevado x-3=294

Answer 1

$9^{2x-1}=1 \\ 9^{2x}:9^1=9^0 \\ 2x-1=0 \\ 2x=1 \\ x=1/2$

b)

$6*7^{x-3}=294 \\ 6*7^{x-3}=6*7^2 \ \ (:6 )\\ 7^{x-3}=7^2\\ x-3=2 \\ x=2+3 \\ x=5$