a + b = 3
b + c = 4
a + c = 5
(a + b) + (b+c)+(a+c) = 3+ 4 + 5
2(a+b+c) = 12
a+b+c=6
(a+b+c)/0,2 = 6 : 1/5 = 30
ответ второй сверху
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a + b = 3
b + c = 4
a + c = 5
(a + b) + (b+c)+(a+c) = 3+ 4 + 5
2(a+b+c) = 12
a+b+c=6
(a+b+c)/0,2 = 6 : 1/5 = 30
ответ второй сверху
Verified answer
А=2. b=1. c=32+1+3=6
6/0.2=30