Question: I need help to solve this please! For the following system of equations in echelon form, tell how many solutions there are in nonnegative integers.

I need help to solve this please!

For the following system of equations in echelon form, tell how many solutions there are in nonnegative integers. 2x + 2y + 2z =80 y - 2z =20 .. . Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. There are nonnegative solutions. O B. There are infinitely many solutions. O C. There is no solution

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