Solve for x, y, z
x=a
y=\frac{3-3a}{4}
z=a
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z=x 3x+4y=3 a=z
Reorder the equations.
a=x
Substitute x for z in the equation a=z.
y=\frac{3}{4}-\frac{3}{4}x x=a
Solve the second equation for y and the third equation for x.
y=\frac{3}{4}-\frac{3}{4}a
Substitute a for x in the equation y=\frac{3}{4}-\frac{3}{4}x.
z=a
Substitute a for x in the equation z=x.
x=a y=\frac{3}{4}-\frac{3}{4}a z=a
The system is now solved.
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