Question

3 elevado x+2+3^x+3^x-1=31

Answer 1

3^x+2 +3^x +3^x-1=31

3^x .3²+3^x +3^x.3-¹=31

3^x.( 3²+1 +3-¹)=31

3^x.(9+1+1/3)=31

3^x.(10+1/3)=31

3^x.(30+1/3)=31

3^x. 31/3=31

3^x.31= 31×3

3^x= 93/31

3^x= 3¹

x=1

S={ 1 }