If x:y = 3:4 , then find the ratio of [7x -4y] : [3x + y] .
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If x:y = 3:4 then
on solving
x/y=3/4
i.e x=(3/4)y______EQ^N(1)
to find the ratio of [7x -4y] : [3x + y] .
[7x -4y] : [3x + y]
=(21y-16y)/(9y+4y) ((ON SUBSTITUTING VALUE FROM EQUATION 1))
=5Y/13Y
=5:13
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.......got the answer...it's 5:13.
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