Solve for x, y, z
x=a+2
y=2\left(a+2\right)
z=a
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x=z+2 z=a
Solve the second equation for x and the third equation for z.
x=a+2
Substitute a for z in the equation x=z+2.
y=2\left(2+a\right)
Substitute 2+a for x in the equation y=2x.
y=4+2a
Calculate y from y=2\left(2+a\right).
x=a+2 y=4+2a z=a
The system is now solved.
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