Solve the System of Four Equations in Four Unknowns Using $$\begin{aligned} x+y+z & =7500 \\X-z & =-500 \\0)04 x+0.03 y+0.02 z & =220\end{aligned}$$

Multiple Choice

Solve the system of four equations in four unknowns using matrices.
- $$\begin{aligned} x+y+z & =7500 \\X-z & =-500 \\0) 04 x+0.03 y+0.02 z & =220\end{aligned}$$

A) $(2000,3500,2000)$
B) $(1500,5000,1000)$
C) $(1000,4000,1500)$
D) $(1500,4000,2000)$