Question 1128596
A parking lot has a surface of 720 m^2. 
{{{A=720m^2}}}
Each car occupies an area of {{{6m^2}}} and each bus occupies an area of {{{18m^2 }}}

if  number of cars occupies an area is {{{x}}}, and number of  buses occupies an area is {{{y}}}, we have

{{{6x+18y<=720}}}...simplify

{{{x+3y<=120}}}


{{{ graph( 600, 600, -100, 100, -100, 100, 6x+18y<=720) }}}