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