if (a-2b):(3a-4b)=5 is the ratio of a to b?
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1 Answer

(a-2b) / (3a-4b) =5

a-2b=5*(3a-4b)  =15a -20b

a-15a =2b-20b

-14a=-18b

a=(18/14)b

a/b=1.2857142

or 9/7
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