time shifting and time scaling operations on a given signal x(t) | linear signals and systems

how to solve signals and systems problems especially basic signal operations like time shifting and time scaling on the given signals is explained in this videos students who is following the below text books can get help from these videos signals and systems by oppenheim signals and systems by simon haykins signals and linear systems by b.p.lathi etc time shifting and time scaling operations on a given signal x(t)