20+2b=30

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Solution for 20+2b=30 equation: 


Simplifying
20 + 2b = 30

Solving
20 + 2b = 30

Solving for variable 'b'.

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

Add '-20' to each side of the equation.
20 + -20 + 2b = 30 + -20

Combine like terms: 20 + -20 = 0
0 + 2b = 30 + -20
2b = 30 + -20

Combine like terms: 30 + -20 = 10
2b = 10

Divide each side by '2'.
b = 5

Simplifying
b = 5

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