Question

if x:y=8:9,find the ratio (7x -4y):3x +2y

Answer 1

Hey there !
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Given x:y = 8:9,

so 9x=8y

x= 9/8 y

So now ,

7x-4y : 3x+2y

= 7(9/8y) -4y / 3(9/8)y + 2y

=63/8 y - 4y / 27/8y +2y

= 63-32/8y : 27+16 /8y

= 63-32:27+16

= 31:43

hope helped !