Solve for x, y, z
x=a+5
y=3\left(a+5\right)
z=a
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x=z+5 z=a
Solve the second equation for x and the third equation for z.
x=a+5
Substitute a for z in the equation x=z+5.
y=3\left(5+a\right)
Substitute 5+a for x in the equation y=3x.
y=15+3a
Calculate y from y=3\left(5+a\right).
x=a+5 y=15+3a z=a
The system is now solved.
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