12
5
2
Put f(x) = 0 and solve for x.
sub x with 0 and solve
Without an equality sign the information given does not qualify it to be an equation
3
If you already know that x = -3 and y = 5 what linear equations are you wanting to solve?
9
x
Solve f(x) =0 or y = 0 (depending on how the equation is given).
To solve the given terms is almost impossible in the absence of any plus, minus and equality signs.