2b+5b-1=20

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Solution for 2b+5b-1=20 equation: 


Simplifying
2b + 5b + -1 = 20

Reorder the terms:
-1 + 2b + 5b = 20

Combine like terms: 2b + 5b = 7b
-1 + 7b = 20

Solving
-1 + 7b = 20

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 = 20 + 1

Combine like terms: -1 + 1 = 0
0 + 7b = 20 + 1
7b = 20 + 1

Combine like terms: 20 + 1 = 21
7b = 21

Divide each side by '7'.
b = 3

Simplifying
b = 3

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