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  • Utilizator Brainly
2014-09-30T21:12:14+03:00
A+13=57
a=57-13
a=44

========
b-15=32
b=32+15
b=47

========
81-c=17
c=81-17
c=64
1 5 1
2014-09-30T21:13:37+03:00
A+13=57⇒a=57-13⇒a=44  , b-15=32⇒b=32+15⇒b=47  , 81-c=17⇒c=81-17⇒c=64