Question

3^X+4*3^X+1=13        rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr

Answer 1

$3^x+4*3^{x+1}=13\3^x(1+4*3)=13\3^x(1+12)=13\3^x*13=13|:13\3^x=1\3^x=3^0\x=0$