−u−3=−5u+13

Sure, let's solve the equation step by step:

1. First, let's move all terms involving 'u' to one side of the equation and the constants to the other side. We can do this by adding 5u to both sides and subtracting 3 from both sides. This gives us:

   -u + 5u = 13 + 3

2. Simplify both sides:

   4u = 16

3. Finally, to solve for 'u', divide both sides by 4:

   u = 16 / 4

So, the solution to the equation is u = 4.