1.

0.25(5f-3)=0.05(10f-9).​

Answer»

0.25(5f-3)=0.05(10f-9)-------given1.25f-0.75=0.5f-0.451.25f-0.5f=0.75-0.451.25f-0.5f=0.30.75f=0.3f=0.3/0.75main answerf=0.4proof0.25(5×0.4−3)=−0.250.05(10×0.4−9)=−0.25Hence PROVED



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