Solve for x, y, z
x=3
y=\frac{a+9}{9}
z=a
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z=-9+9y 7x-10+2x-0=17 a=z
Reorder the equations.
a=-9+9y
Substitute -9+9y for z in the equation a=z.
x=3 y=1+\frac{1}{9}a
Solve the second equation for x and the third equation for y.
z=-9+9\left(1+\frac{1}{9}a\right)
Substitute 1+\frac{1}{9}a for y in the equation z=-9+9y.
z=a
Calculate z from z=-9+9\left(1+\frac{1}{9}a\right).
x=3 y=1+\frac{1}{9}a z=a
The system is now solved.
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