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What is a plus b plus c if a plus b equals 17 a plus c equals 36 and b plus c equals 25?
Wiki User
∙ 12y ago
a+b = 17
a+c = 36 ----> c = 36 - a
b+c = 25 ----> c = 25 - b
So since both are c, we say
36 - a = 25 -b
From this : 11 = a - b
Look at 1st eqn: a + b = 17
Now we have: a - b = 11 ----> a = 11 + b
So we can substitute that into a + b = 17 to make:
(11 + b) + b = 17
11 + 2b = 17
So b = 3
If b = 3, then a + 3 = 17 , so a = 14
, 3 + c = 25, so c = 22
So a=14, b=3, c=22, so a+b+c = 14+3+22 = 39
Wiki User
∙ 12y ago
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