Answer:
The answer is u=-2.5
Step-by-step explanation:
This exercise consists in clear the value of u, so we will have to made a subtraction and a division, this is:
[tex]6.4u-5.1u=-3.25\\Subtracting\\1.3u=-3.25\\Dividing\\u=\frac{-3.25}{1.3} \\u=-2.5[/tex]
From the above the answer is u=-2.5
