

1. ordinary equations

y = 2x^3 - 4




2. differential equations

rate of change, acceleration etc.


dy/dx = 3x^2 - 3x + 2





3. partial differential equations

tilt in several dimensions


2 x 6y/6x + 6z/6x = 2




4. simultaneous equations

may define a region, single value, or no solution


y = 2x + 4

y = 3x - 2




5. non simple dependant variable

rarely used equation form


y^2 + y = 3x^2 - 4x + 1




6. several variables


k = ax + by + cz + ds




