The associative law means that if all the arithmetic operations in an equation are the same, the position of the brackets do not matter and no matter which variables are associated, the result would still be the same.
The commutative law means that if all the arithmetic operations in an equation are the same, the position of the variables do not matter and no matter what order the variables are placed, the result would still be the same.
The distributive law means that whatever is outside of the bracket has to be multiplied into the variables in the bracket evenly. E.g. 1/4 (8x - 20) involves multiplying both 8x by 1/4 and 20 by 1/4.
The percentage of lemon in the juice is 10% The percentage of water sugar is (100-10)=90% The quantity of lemon in 20 liters of sugar water will be: amount=(percentage of lemon)/(percentage of sugar water)×(amount of sugar water) =10/90×20 =2 2/9 liters
