Answer:
Option A. -6.5
Step-by-step explanation:
we have
[tex]6.4r-5.9r=-3.25[/tex]
Solve for r
That means ---> isolate the variable r
Combine like terns left side of the equation
[tex]0.5r=-3.25[/tex]
Divide by 0.5 both sides
[tex]0.5r/0.5=-3.25/0.5[/tex]
[tex]r=-6.5[/tex]
