Final answer:
To find the value of 9u-5, solve for u from -17u-9=8 to find u=-1, then substitute u into 9u-5 to get -14.
Step-by-step explanation:
To find the value of 9u-5 given that -17u-9=8, we first need to solve the equation for u. Start by adding 9 to both sides of the equation:
-17u-9+9 = 8+9
-17u = 17
Next, divide both sides by -17 to find u:
u = 17 / -17
u = -1
Now that we know u = -1, substitute it into the expression 9u-5 to find the value:
9(-1)-5 = -9-5
The value of 9u-5 is -14.