SOLUTION: The length of a room floor exceeds its breadth by 20 m .The area of floor remains unaltered when the length is decreased by 10 m but the breadth is increased by 5 m.The area of the

Question 824382: The length of a room floor exceeds its breadth by 20 m .The area of floor remains unaltered when the length is decreased by 10 m but the breadth is increased by 5 m.The area of the floor ( in square meters)is:
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
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x = length
y = width
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x = y + 20
a = xy = (x - 10)(y + 5)
xy = xy + 5x - 10y - 50
5x - 10y = 50
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put the system of linear equations into standard form
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x = y + 20
5x - 10y = 50
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x - y = 20
5x - 10y = 50
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copy and paste the above standard form linear equations in to this solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
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answer:
x = length = 30 m
y = width = 10 m
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