There are eighty cars in the parking lot and sixty eight are not blue.
The three integers are x, x+2, x+4
5(3x+6)=42+x(x+2)
15x+30=x^2+2x+42
x^2 - 13x +12=0
(x-12)(x-1) = 0
x = 12 or 1
since the integers have to be odd we exclude 12
integers are 1,3,5
32(83ml)(L/1000ml)=2.656L
Assuming that you can only order integer values, ie not partial bottles, you will need three bottles of acid.
