Find the real solutions for:

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- April 3rd 2011, 06:31 PMSoromboFind the Real solutions
Find the real solutions for:

- April 3rd 2011, 09:10 PMveileen
Has no real solutions.

1.

Impossible because:

, , , , and .

2.

Impossible because:

and .

I used the inequality between the root mean square and the arithmetic mean of numbers x, y, z, u and v.