B=4(r-5)

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Solution for B=4(r-5) equation:



=4(B-5)
We move all terms to the left:
-(4(B-5))=0
We calculate terms in parentheses: -(4(B-5)), so:
4(B-5)
We multiply parentheses
4B-20
Back to the equation:
-(4B-20)
We get rid of parentheses
-4B+20=0
We move all terms containing B to the left, all other terms to the right
-4B=-20
B=-20/-4
B=+5

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