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-13b=-4-13b
We move all terms to the left:
-13b-(-4-13b)=0
We add all the numbers together, and all the variables
-13b-(-13b-4)=0
We get rid of parentheses
-13b+13b+4=0
We add all the numbers together, and all the variables
4!=0
There is no solution for this equation
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