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