Solve for x, y, z
x=800
y=500
z=300
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x=-3y-3z+3200
Solve x+3y+3z=3200 for x.
-3y-3z+3200+4y+3z=3700 -3y-3z+3200+3y+4z=3500
Substitute -3y-3z+3200 for x in the second and third equation.
y=500 z=300
Solve these equations for y and z respectively.
x=-3\times 500-3\times 300+3200
Substitute 500 for y and 300 for z in the equation x=-3y-3z+3200.
x=800
Calculate x from x=-3\times 500-3\times 300+3200.
x=800 y=500 z=300
The system is now solved.
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