Let x cubic cm of 10% acid is mixed with (150-x) cubic cm of 4% solution to obtain 150 cubic cm that is 6% acid .
Therefore the equation is
Combining like terms, we will get
Dividing both sides by 0.06,
50 cubic cm of 10% acid is mixed with
of 4% solution to obtain 150 cubic cm that is 6% acid .
Answer:
-250
Step-by-step explanation:
assuming he starts at 0 pts -50 * 5 = -250