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In a system of equations with two variables, you generally need two equations to find a unique solution, and this system is no exception. One example of a solution to this problem is (1, 2), but (3, 9) and (5, 16) also work, and there are actually infinitely many solutions to this single equation.
Answer:
528
Step-by-step explanation:
32 percent of 400 is 128.
Answer:
It 10 more
Step-by-step explanation:
Because
Answer:
4 liters of 5% solution and 16 liters of 17.5% solution we need.
Step-by-step explanation:
Let us assume that x liters of 5% solution and y liters of 17.5% solution are taken.
So, x + y = 20 ........ (1)
As the final solution is of 15%, so we can write
⇒ 5x + 17.5y = 300 ......... (2)
Now, solving equations (1) and (2) we get,
17.5y - 5y = 200
⇒ 12.5y = 200
⇒ y = 16 liters
Hence, x = 20 - y = 4 liters.
Therefore, 4 liters of 5% solution and 16 liters of 17.5% solution we need. (Answer)