How to make both `x` and `y` axises look in same scale? [duplicate]

Plot the equation y = 2x - 7, where x goes from -10 to 10.

Plot[2x-7,{x,-10,10}] 

output: enter image description here

Question: On image x axis looks more elongated than y axis (contain more values on image length). How to make both x and y axises look in same scale?