How do you know if a value is a solution for an inequality?
Substitute the value for the variable and see if it leads to a true inequality.
How is this different from determining if a value is a solution to an equation?
It isn't. Substitute the value for the variable and see if it leads to a true equation.
If you replace the equal sign of an equation and put an inequality sign in its place, is there ever a time when the same value will be a solution to both the equation and inequality?
Yes, but only sometimes when the inequality sign is or but never when the inequality sign is , or .
Edwin