Question 634606
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
the idea is to have the base numbers the same &#8658; Exponents are Equal
a) 7^x=49   &#8658;  7^x = 7^2   &#8658;  x = 2
b) 243 = 9^2x+1  &#8658;  {{{3^5 = 3^(2(2x+1))}}}  &#8658;  5 = 2(2x+1), x = 3/4
c) 2^2x * 4^4x +8 = 64  &#8658;  {{{2^(2x)*2^(2(4x+8)) = 2^(10x + 16)= 2^6}}}, x= -1
d)9^x-1 * 81 ^2x-1 = 27^3x-2  &#8658; {{{3^(10x-6) = 3^(9x-6 )}}} x = 0