Answer:
[tex]x=(c-60)/85[/tex]
Step-by-step explanation:
we have
[tex]c=85x+60[/tex]
Solve for x
That means -----> isolate the variable x
subtract 60 both sides
[tex]c-60=85x+60-60\\c-60=85x[/tex]
Divide by 85 both sides
[tex](c-60)/85=85x/85\\(c-60)/85=x[/tex]
Rewrite
[tex]x=(c-60)/85[/tex]