1) (13/10)2*x-2=3, 169/100x-2=3, 100*169/100x-100*2=100*3, 169x-200=300, 169x=300+200, 169x=500, x=500/169.
2)625x+2*25-15=0, 625x+50x-15=0, 675x-15=0675x=15, x=15/675, x=1/45
3)265x-16+1-14=0, 240X=13, X=13/240
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Answers & Comments
1) (13/10)2*x-2=3, 169/100x-2=3, 100*169/100x-100*2=100*3, 169x-200=300, 169x=300+200, 169x=500, x=500/169.
2)625x+2*25-15=0, 625x+50x-15=0, 675x-15=0675x=15, x=15/675, x=1/45
3)265x-16+1-14=0, 240X=13, X=13/240