Solve for x, y, z, a
a=14
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z=2\times 1+6\times 2
Consider the third equation. Insert the known values of variables into the equation.
z=2+12
Do the multiplications.
z=14
Add 2 and 12 to get 14.
a=14
Consider the fourth equation. Insert the known values of variables into the equation.
x=1 y=2 z=14 a=14
The system is now solved.
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