Question 1206274
Dimensions of new patio, increased area with the tiled part


****************MISTAKEN INTERPRETATION IN SET-UP***********
****************NEED PLUS.  NOT MINUS***********************
{{{(12-2x)(10-2x)=180}}} square feet total area; simple algebra from here.


{{{2(6-x)*2(5-x)=2*2*45}}}

{{{(6-x)(5-x)=45}}}

{{{30-11x+x^2=45}}}

{{{x^2-11x=15}}}