2b+5b-1=13

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Solution for 2b+5b-1=13 equation: 


Simplifying
2b + 5b + -1 = 13

Reorder the terms:
-1 + 2b + 5b = 13

Combine like terms: 2b + 5b = 7b
-1 + 7b = 13

Solving
-1 + 7b = 13

Solving for variable 'b'.

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

Add '1' to each side of the equation.
-1 + 1 + 7b = 13 + 1

Combine like terms: -1 + 1 = 0
0 + 7b = 13 + 1
7b = 13 + 1

Combine like terms: 13 + 1 = 14
7b = 14

Divide each side by '7'.
b = 2

Simplifying
b = 2

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