The complete set of all solutions is called as the solution set for the equation or inequality.  There is also some formal notation for solution sets.  We have to still acknowledge it.

For equations we indicate the solution set through enclosing all the solutions is a set of braces, {} .  For the two of equations we looked at above here are the solution sets.

3(y + 1) +4 y - 5         Solution Set : {8}

x² - 9 = 0         Solution Set : {-3, 3}