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2014-10-25T18:05:59+03:00
(2x+1) : 7=6
2x+1=6*7
2x+1=42
2x=42-1
2x=41
x= 41:2
x=20,5

10:(5x+2)=5
5x+2=5*10
5x+2=50
5x=50-2
5x=48
x=48:5
x=9,6
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