b+4b=90

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Solution for b+4b=90 equation: 


Simplifying
b + 4b = 90

Combine like terms: b + 4b = 5b
5b = 90

Solving
5b = 90

Solving for variable 'b'.

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

Divide each side by '5'.
b = 18

Simplifying
b = 18

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