Solve for B
B=12
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3B+6\times 2B=180
Combine 2B and B to get 3B.
3B+12B=180
Multiply 6 and 2 to get 12.
15B=180
Combine 3B and 12B to get 15B.
B=\frac{180}{15}
Divide both sides by 15.
B=12
Divide 180 by 15 to get 12.
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