1.

12. If (x:y)3:4, then (7x +3y):(7x-3y)?

Answer»

x:y=3:4x/y=3/4

7x+3y/7x-3y

Divide every term with y

7(x/y)+3 / 7(x/y)-3=7(3/4)+3 / 7(3/4)-3

=21/4 + 3 / 21/4 -3

=33/4 / 9/4

33/9



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