Solve for x, y, z
x=a-4
y=a-12
z=a
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z=x+4 x-y=8 a=z
Reorder the equations.
a=x+4
Substitute x+4 for z in the equation a=z.
y=x-8 x=a-4
Solve the second equation for y and the third equation for x.
y=a-4-8
Substitute a-4 for x in the equation y=x-8.
y=a-12
Calculate y from y=a-4-8.
z=a-4+4
Substitute a-4 for x in the equation z=x+4.
z=a
Calculate z from z=a-4+4.
x=a-4 y=a-12 z=a
The system is now solved.
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