2b-4b=-21+11

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Solution for 2b-4b=-21+11 equation: 



2b-4b=-21+11

We move all terms to the left:

2b-4b-(-21+11)=0

We add all the numbers together, and all the variables

2b-4b-(-10)=0

We add all the numbers together, and all the variables

-2b+10=0

We move all terms containing b to the left, all other terms to the right

-2b=-10

b=-10/-2

b=+5

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