b-12=-9

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Solution for b-12=-9 equation:


b-12=-9

We simplify the equation to the form, which is simple to understand 
b-12=-9

We move all terms containing b to the left and all other terms to the right. 
+1b=-9+12

We simplify left and right side of the equation. 
+1b=+3

We divide both sides of the equation by 1 to get b. 
b=3

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