For the Following Systems of Equations in Echelon Form, Tell $$\begin{array}{r}x+3 y+4 z=80 \\4 y+5 z=40\end{array}$$

question 69

Multiple Choice

For the following systems of equations in echelon form, tell how many solutions there are in nonnegative integers.
- $$\begin{array}{r}x+3 y+4 z=80 \\4 y+5 z=40\end{array}$$

• A) 2
• B) 4
• C) 3
• D) 5

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