Solve for x, y, z, a
a=2
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z=7-5
Consider the third equation. Insert the known values of variables into the equation.
z=2
Subtract 5 from 7 to get 2.
a=2
Consider the fourth equation. Insert the known values of variables into the equation.
x=5 y=7 z=2 a=2
The system is now solved.
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