Răspunsuri

2014-09-16T19:12:28+03:00
A+C=170⇒A=170-C
A-30=C
inlocuim A cu 170-C
170-C-30=C
170-30=C+C
140=2C
C=140/2
C=70
A=170-70
A=100

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  • Utilizator Brainly
2014-09-16T19:13:31+03:00