Solve for x, y, z
x=\frac{a-b}{4}
y=-2
z=a
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x=\frac{1}{4}z-\frac{1}{4}b z=a
Solve the second equation for x and the third equation for z.
x=\frac{1}{4}a-\frac{1}{4}b
Substitute a for z in the equation x=\frac{1}{4}z-\frac{1}{4}b.
x=\frac{1}{4}a-\frac{1}{4}b y=-2 z=a
The system is now solved.
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