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19+u+19=-7-4u
We move all terms to the left:
19+u+19-(-7-4u)=0
We add all the numbers together, and all the variables
u-(-4u-7)+19+19=0
We add all the numbers together, and all the variables
u-(-4u-7)+38=0
We get rid of parentheses
u+4u+7+38=0
We add all the numbers together, and all the variables
5u+45=0
We move all terms containing u to the left, all other terms to the right
5u=-45
u=-45/5
u=-9
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