Solve for x, y, z
x=a-2
y=2
z=a
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z=x+2 x+y=x+2 a=z
Reorder the equations.
a=x+2
Substitute x+2 for z in the equation a=z.
y=2 x=a-2
Solve the second equation for y and the third equation for x.
z=a-2+2
Substitute a-2 for x in the equation z=x+2.
z=a
Calculate z from z=a-2+2.
x=a-2 y=2 z=a
The system is now solved.
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