Solve for x, y, z, a
a=3
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z=1+2
Consider the third equation. Insert the known values of variables into the equation.
z=3
Add 1 and 2 to get 3.
a=3
Consider the fourth equation. Insert the known values of variables into the equation.
x=1 y=2 z=3 a=3
The system is now solved.
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