42=7(b+3)

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Solution for 42=7(b+3) equation:



42=7(b+3)
We move all terms to the left:
42-(7(b+3))=0
We calculate terms in parentheses: -(7(b+3)), so:
7(b+3)
We multiply parentheses
7b+21
Back to the equation:
-(7b+21)
We get rid of parentheses
-7b-21+42=0
We add all the numbers together, and all the variables
-7b+21=0
We move all terms containing b to the left, all other terms to the right
-7b=-21
b=-21/-7
b=+3

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