Question

2^3x=5^x
3^x=7^x/2
5^x-3=2^3-x

Answer 1

$2^{3x}=5^x\ 8^x=5^x\ ( frac{8}{5} )^x=1=( frac{8}{5} )^0\ x=0$

$3^x=7^ frac{x}{2} \ 3^x=( sqrt{7} )^x\ ( frac{3}{ sqrt{7} } )^x=1=( frac{3}{ sqrt{7} } )^0\ x=0$

$5^{x-3}=2^{3-x}\ 5^{x-3}=( frac{1}{2} )^{x-3}\ 10^{x-3}=1 = 10^0\ x-3=0\ x=3$