-5
Without an indication of the equals sign, this is not an equation.
Not sure what you mean; that equation certainly has a solution.
x = 19
One equation with two unknowns usually does not have a solution.
If: 4x = x+15 Then: x = 5
Since the highest power of 'x' in the equation is '1', there's one solution.
There is no solution since the equation is inconsistent.
x = 0 and y = 4
The equation does not have a solution.
-5
Without an indication of the equals sign, this is not an equation.
Not sure what you mean; that equation certainly has a solution.
It is a linear equation in x. The equation has the solution x = 0.
Without an equality sign the given expression can't be considered to be an equation but if it equals 0 then using the quadratic equation formula will give its solutions.
x = 19
One equation with two unknowns usually does not have a solution.