Question 251057
{{{x^(3/2)- 27=0}}}
{{{x^(3/2)=27}}}
{{{(x^(3/2))^(2/3)= 27^(2/3)
{{{x = 27^(2/3)}}}
{{{x= 3*27^(1/3)}}}
{{{x=3*3=9}}}
¬
{{{4^x=79}}}
{{{log(base10) 4^x = log(base10)79}}}
{{{x*log(base10)4= log(base10)79}}}
{{{x=log(base10)79/log(base10)4}}}
{{{x= 3.1518}}} 4dp.
¬
{{{9^(x+2)=27^x}}} lets get the bases to be 3.
{{{(3^2)^(x+2)= (3^3)^x}}}
{{{3^(2x+4)=3^(3x)}}}
{{{2x+4=3x}}}
{{{x=4}}}

Now you try the rest...