A Differential Equation is a n equation with a function and one or more of its derivatives. The most common type of equation is a polynomial equation commonly called also an algebraic equation in which the two sides are polynomials. Substitute the obtained value in any of the equations to also get the value of the other variable.
When x is 0 y is already 1.
An equation with the function y and its derivative dy dx. An Unknown in an equation is the variable to be solved. Here are some example values. Add 4x and subtract 1 from both sides of the equation.