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3x/5=1 3x=1.5 3x= 5 x= 5/3 4x/7=1 4x= 1.7 4x=7 x=7/4 0,75x=1 75/100x=1 75x= 1. 100 75x=100 x= 100/75 x=20/15 2,5x=1 25/10x=1 25x=1. 10 x= 10/25 x=2/5
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3x/5=1 3x=1.5 3x= 5 x= 5/3 4x/7=1 4x= 1.7 4x=7 x=7/4 0,75x=1 75/100x=1 75x= 1. 100 75x=100 x= 100/75 x=20/15 2,5x=1 25/10x=1 25x=1. 10 x= 10/25 x=2/5