90=2b-9

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Solution for 90=2b-9 equation:


Simplifying
90 = 2b + -9

Reorder the terms:
90 = -9 + 2b

Solving
90 = -9 + 2b

Solving for variable 'b'.

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

Add '-2b' to each side of the equation.
90 + -2b = -9 + 2b + -2b

Combine like terms: 2b + -2b = 0
90 + -2b = -9 + 0
90 + -2b = -9

Add '-90' to each side of the equation.
90 + -90 + -2b = -9 + -90

Combine like terms: 90 + -90 = 0
0 + -2b = -9 + -90
-2b = -9 + -90

Combine like terms: -9 + -90 = -99
-2b = -99

Divide each side by '-2'.
b = 49.5

Simplifying
b = 49.5

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