10+b+b=20

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Solution for 10+b+b=20 equation: 



10+b+b=20

We move all terms to the left:

10+b+b-(20)=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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