10-2b=9

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Solution for 10-2b=9 equation: 


Simplifying
10 + -2b = 9

Solving
10 + -2b = 9

Solving for variable 'b'.

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

Add '-10' to each side of the equation.
10 + -10 + -2b = 9 + -10

Combine like terms: 10 + -10 = 0
0 + -2b = 9 + -10
-2b = 9 + -10

Combine like terms: 9 + -10 = -1
-2b = -1

Divide each side by '-2'.
b = 0.5

Simplifying
b = 0.5

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