How do you solve 8u + 23= - 3( u - 4)?

the answer is $u = - 1$
first distribute $- 3$ to it's equation. now you need only one $u$ so remove one form one side. I did $8 u - \left(- 3 u\right)$ now subtract $23$ from both sides. now you can divide by $11$ and there you go