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4(u+1)=-20
We move all terms to the left:
4(u+1)-(-20)=0
We add all the numbers together, and all the variables
4(u+1)+20=0
We multiply parentheses
4u+4+20=0
We add all the numbers together, and all the variables
4u+24=0
We move all terms containing u to the left, all other terms to the right
4u=-24
u=-24/4
u=-6
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