Solve for x, y, z
x=\frac{a}{8}
y=4
z=a
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y=4
Calculate y from y=7-3.
x=\frac{1}{8}z z=a
Solve the second equation for x and the third equation for z.
x=\frac{1}{8}a
Substitute a for z in the equation x=\frac{1}{8}z.
x=\frac{1}{8}a y=4 z=a
The system is now solved.
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