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a fost răspuns

calculati a+2b+c stiind ca a+b=15 si b+c=23 17a+5c+22b stiind ca a+b=5 sj b+c=8

Răspuns :

Kirstykitty
a+b=15
b+C=23
a+b+b+c=15+23
a+2b+c=38


a+b=5/×17
b+c=8/×5

17a+17b=85
5b+5c=40
17a+17b+5b+5c=85+40
17a+22b+5c=125

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