0•25(4f-3) =0•05(10f-9)
simplify
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0.25(4f-3)=0.05(10f-9)
0.25(4f)-0.25(3)=0.05(10f)-0.05(9)
0.25(4f)-0.75=0.05(10f)-0.45
0.25(4f)=0.05(10f)-0.45+0.75
0.25(4f)=0.05(10f)-0.3
(0.25×4f)=(0.05×10f)-0.3
f=0.5f-0.3
f-0.5f=0.3
0.5f=0.3
f=0.3/0.5
f=0.6
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