Question 390008
Hint: Since {{{2^y=4^x}}}, this means that {{{2^y=(2^2)^x}}} and {{{2^y=2^(2x)}}}



So because {{{2^y=2^(2x)}}}, this means that {{{y=2x}}} (ie since the bases are equal, the exponents are equal)



So the second equation becomes {{{y=2x}}}