Question 919768
This year, area is {{{5*8}}}.


Next year, area will be {{{(5+x)(8+x)}}}.
That must be {{{2*(5*8)}}}.


{{{(5+x)(8+x)=2*5*8}}}.
Solve for x.
Evaluate x+5 and x+8.



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{{{x^2+13x+5*8=2*5*8}}}
{{{x^2+13x-5*8=0}}}
{{{x^2+13x-40=0}}}


{{{x=(-13+sqrt(169+4*40))/2}}}
{{{x=(-13+sqrt(169+160))/2}}}
{{{highlight(x=(-13+sqrt(329))/2)}}}
About 2.57 meters increase to each dimension.