Solve for x, y, z, a
x=30
y=40
z=5
a=-2
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a=\frac{30-40}{5}
Consider the fourth equation. Insert the known values of variables into the equation.
a=\frac{-10}{5}
Subtract 40 from 30 to get -10.
a=-2
Divide -10 by 5 to get -2.
x=30 y=40 z=5 a=-2
The system is now solved.
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