Every words stands for unique digit that makes the arithmetic equation true

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

Can you write down eight eights so that they add up to one thousand?

A man died, leaving $10,000,000 for his widow, 5 sons and 4 daughters. Each daughter received an equal amount, each son received twice as much as a daughter, and the widow received three times as much as a son.

How much did the widow receive?

People make me, save me, change me, raise me. What am I?

I have no life, but I can die. What am I?

I don't get anymore wetter, no matter how much rain falls on me.

What does this rebus means ?

PROG WORKRESS

I am the fastest animal but cannot climb the tree. What am I?

While sitting in the Car, John suddenly finds that one of the wheels was missing. John noticed that a killer is approaching towards him. John cannot get out of the car.

How will John escape?

What does this mathematical rebus means ?