Solve for x, y, z
z=70
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x=0
Consider the first equation. Multiply \frac{1}{2} and 0 to get 0.
y=20+50
Consider the second equation. Do the multiplications.
y=70
Add 20 and 50 to get 70.
z=70
Consider the third equation. Insert the known values of variables into the equation.
x=0 y=70 z=70
The system is now solved.
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