3B+3B-7=5

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Solution for 3B+3B-7=5 equation: 


Simplifying
3B + 3B + -7 = 5

Reorder the terms:
-7 + 3B + 3B = 5

Combine like terms: 3B + 3B = 6B
-7 + 6B = 5

Solving
-7 + 6B = 5

Solving for variable 'B'.

Move all terms containing B to the left, all other terms to the right.

Add '7' to each side of the equation.
-7 + 7 + 6B = 5 + 7

Combine like terms: -7 + 7 = 0
0 + 6B = 5 + 7
6B = 5 + 7

Combine like terms: 5 + 7 = 12
6B = 12

Divide each side by '6'.
B = 2

Simplifying
B = 2

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