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-13u+20-1=-19-15u
We move all terms to the left:
-13u+20-1-(-19-15u)=0
We add all the numbers together, and all the variables
-13u-(-15u-19)+20-1=0
We add all the numbers together, and all the variables
-13u-(-15u-19)+19=0
We get rid of parentheses
-13u+15u+19+19=0
We add all the numbers together, and all the variables
2u+38=0
We move all terms containing u to the left, all other terms to the right
2u=-38
u=-38/2
u=-19
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