Question

Agradezco su colaboracion.

Answer 1

9^-X=7
log(9^-X)=log7
x(log(1/9)=log7
 x=log7/(log(1/9)
x=-0.88
x=-88/100

27^2X+1
27^2(-88/100)+1
27^(-88/50)+1
27^(-44/25)+1
27^-19/25 RPTA