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Question 828062: The width of the yard is one-third the length.
The perimeter of the yard is 80 feet.
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! ---
x = (1/3)y
2x + 2y = 80
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put the system of linear equations into standard form:
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x - 0.333333y = 0
2x + 2y = 80
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copy and paste the above linear system in standard form into this matrix-method solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
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solution:
x = 9.9999925 = 10 ft
y = 30.000008 = 30 ft
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system matrix
1 -0.333333
2 2
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inverse of system matrix
0.75000019 0.12499991
-0.75000019 0.37500009
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determinant of system matrix = 2.666666
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