A chemist has one solution, which is 50% acid and the second which is 25% acid. How much of each should be mixed to form 10 litres of 40% acid solutions

Concept- We can acquire linear equations that correspond to the question by assigning variables to the required values of respective liquids and use these to calculate the assumed values of the respective
s.
Consider as the amount of first
and as the amount of seconds to be taken.
The amount of acid in and another has to be water.
The amount of water .
The amount of acid in The amount of water in The total amount of acid required in final
litres and
The remaining 6 litres will be water.
Therefore,Or, Similarly for water,
When substituting the value of from (1) into (2), we get
As a result, 6 litres of the first
and 4 litres of the second
should be combined to make the required acid .
Hence, the correct answer is option 1) 6 litres of the first
and 4 litres of the second .
  of a Linear Equation
of a Linear Equation