It is a linear expression with one variable, b. Since it is not an equation it cannot be solved.
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3+2b+6 .... is this the question... i think the question will be 3+2b=6 b=1.5
= a + b - 2
It is (B + b)/3.
2B Multiplied by 3 plus B = 7B. Here is how it's worked out. You start with 2B, multiply that by 3 and you get 6B. Now all you have to do is add the last B, therefore adding 1B to equal 7B.
2b