Solve for x, y, z
x=w+2a
y=a
z=a
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y=z z=a
Solve the second equation for y and the third equation for z.
y=a
Substitute a for z in the equation y=z.
x=2a+w
Substitute a for y in the equation x=2y+w.
x=2a+w y=a z=a
The system is now solved.
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