That word "equals" in there makes it an equation.
Yes it is. The thing that makes it a quadratic equation is that "x squared" in there.
The equation soild plus gas equals a liquid
3 is the true!
this equation makes no sense, 6% of what?
If: x+18 = 2x Then: x = 18
The equation of such a line is [ Y = -4x plus any number].
That equation has no solutions.There's no number that can go in place of 'x' that canmake the equation a true statement.