i been trying to pass my classes and i gave up and now im just looking for the answer does anyone know any website to get the answer ?

A calculator would be best. This website provides a calculator. But the only other thing I could think of is https://www.symbolab.com/

what is that website for 

Its a calculator website purely for algebra. But I just say keep practicing. You will understand eventualy.

desmos is good for graphing https://www.desmos.com/