Solve for x, y, z, a
a=40
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z=8\times 4+4\times 2
Consider the third equation. Insert the known values of variables into the equation.
z=32+8
Do the multiplications.
z=40
Add 32 and 8 to get 40.
a=40
Consider the fourth equation. Insert the known values of variables into the equation.
x=4 y=2 z=40 a=40
The system is now solved.
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