Răspunsuri

2014-11-07T18:09:47+02:00
151+81:x=154
81:x=154-151
81:x=3
x=81:3
x=27

880:x+19=39880:x=39-19
880:x=20
x=880:20
x=44

x:10+39=139x:10=139-39
x:10=100
x=100:10
x=10

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