Solve for x, y, z, a
a=-28
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z=-7\times 2^{2}
Consider the third equation. Insert the known values of variables into the equation.
z=-7\times 4
Calculate 2 to the power of 2 and get 4.
z=-28
Multiply -7 and 4 to get -28.
a=-28
Consider the fourth equation. Insert the known values of variables into the equation.
x=3 y=2 z=-28 a=-28
The system is now solved.
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