3B+2B-7=13

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Solution for 3B+2B-7=13 equation: 


Simplifying
3B + 2B + -7 = 13

Reorder the terms:
-7 + 3B + 2B = 13

Combine like terms: 3B + 2B = 5B
-7 + 5B = 13

Solving
-7 + 5B = 13

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 + 5B = 13 + 7

Combine like terms: -7 + 7 = 0
0 + 5B = 13 + 7
5B = 13 + 7

Combine like terms: 13 + 7 = 20
5B = 20

Divide each side by '5'.
B = 4

Simplifying
B = 4

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