Solve for x, y, z
x=3600
y=900
z=8100
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5\times 4y+2y=19800 2\times 4y+y=z
Substitute 4y for x in the second and third equation.
y=900 z=9y
Solve these equations for y and z respectively.
z=9\times 900
Substitute 900 for y in the equation z=9y.
z=8100
Calculate z from z=9\times 900.
x=4\times 900
Substitute 900 for y in the equation x=4y.
x=3600
Calculate x from x=4\times 900.
x=3600 y=900 z=8100
The system is now solved.
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