x*y=60
(x+4)*(y-0.5)=60
y=60/x
(x+4)*(60/x-0.5)=60
-1/2x(x-20)(x+24)=0
-x/2+10=0
x+24=0
x1=-24
-0.5x=-10
x=-10/(-0.5)
x=20 машин
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x*y=60
(x+4)*(y-0.5)=60
y=60/x
(x+4)*(60/x-0.5)=60
-1/2x(x-20)(x+24)=0
-x/2+10=0
x+24=0
x1=-24
-0.5x=-10
x=-10/(-0.5)
x=20 машин