68=20b+-12

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Solution for 68=20b+-12 equation: 



68=20b+-12

We move all terms to the left:

68-(20b+-12)=0

We add all the numbers together, and all the variables

-(20b-12)+68=0

We get rid of parentheses

-20b+12+68=0

We add all the numbers together, and all the variables

-20b+80=0

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

-20b=-80

b=-80/-20

b=+4

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