2b + 3 b = 12 .
27 since the beginning is 2 x 12, which equals 24, and then you have to add the extra 3.
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-b+5b-2b=2b
8b + 11 - 3b = 2b + 2 5b + 11 = 2b + 2 5b - 2b = 2 - 11 3b = -9 b = -3
Taking it step by step: 2b - b - 10 = -13 b - 10 = -13 b = -13 + 10 b = - 3
If: a = 2b+c Then: a-c = 2b And: b = (a-c)/2
3a + 2b = c (find a in terms of b and c)3a +2b -2b = c - 2b3a = c - 2b3a/3 = (c - 2b)/3a = (c - 2b)/3In order to find the value of a, you can give any values to b, and c (except a zero value).