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Equations an dmixture problem

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I need to know how to answer these three questions please explain

1. Solve

2x+y=8
5x-y=6

2. Stella's Catering is planning a wedding reception. The bride and groom would like to serve a nut mixture containing 25% peanuts. Stella has available mixtures that are either 40% or 10% peanuts. How much of each type should be mixed to get a 10-lb mixture that is 25% peanuts?

3. Solve

5x+y=20
2y+6x=18

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Solution Summary

This solution provides an example of solving a system of equations and working with a mixture problem.

Solution Preview

Problem #1
(1) 2x + y = 8
(2) 5x - y = 6
Let (1) + (2), and we get 7x = 14. So x = 2
Then we plug in (1) and get 4 + y = 8, then y = 4.
Thus the solution is x = 2, y = 4.

Problem #2
Suppose the ...

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