2l+2b=30

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Solution for 2l+2b=30 equation: 


Simplifying
2l + 2b = 30

Reorder the terms:
2b + 2l = 30

Solving
2b + 2l = 30

Solving for variable 'b'.

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

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

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

Divide each side by '2'.
b = 15 + -1l

Simplifying
b = 15 + -1l

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