Find the value of x and y if the length of the rectangle is x + 3y 13 and breadth is 3x+y and 7
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length=x+3y=13_ equation 1
breadth=3x+y=7_ equation 2
add equation 1&2
x+3y=13+3x+y=7
4x+4y=20
take common 4
4(x+y)=20
x+y=5
x=5-y
y=5-x
breadth=3x+y=7_ equation 2
add equation 1&2
x+3y=13+3x+y=7
4x+4y=20
take common 4
4(x+y)=20
x+y=5
x=5-y
y=5-x
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