Question 339396
6u+5(u+3)= 4 solve for u

To solve for a variable means to isolate the variable.

We want to remove the parentheses first.  To do this, we use the distributive rule.  Whenever you see a parentheses, remove it as your first step.

6u+5(u+3)= 4

6u + 5u + 15 = 4

11u + 15 = 4

11u = 4 - 15

11u = -11

u = -11/11

u = -1