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Norbi131
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stiind ca 5x+18+20y=43 dterminati 15x+38+6y





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Răspuns :

5x+18+20y=43
5x+20y=43-18
5x+20y=25
5(x+4y)=25
x+4y=25:5
x+4y=5

15x+38+60y
(15x+60y)+38
15(x+4y)+38
15·5+38
75+38=113

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