Solve for x, y, z, a
a=11
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z=2\times 4-3\left(-1\right)
Consider the third equation. Insert the known values of variables into the equation.
z=8+3
Do the multiplications.
z=11
Add 8 and 3 to get 11.
a=11
Consider the fourth equation. Insert the known values of variables into the equation.
x=4 y=-1 z=11 a=11
The system is now solved.
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