solve -1 4/5 x =9
answer key: 5, 1/5, -5, -1/5

i tried so many different ways and i just don't get it and i really need to get this done.

Pls an ice cream shop sells 5 times as many cake cones as waffle cones use variable x to represent the number of waffle the ice cream shop sells and use this variable to write an expression for the number of cake cones the ice cream shop sells. enter the expression for the number of cake cones the ice cream shop sells

Which of these triangle pairs can be mapped to each other using two reflections?

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?