Newspaper weekly sales

From Monday to Friday, 9650 newspapers were sold, on Tuesday 1680 were sold, on Monday 50 more than on Tuesday, on Wednesday the same as on Tuesday and on Thursday 2x more than on Tuesday. How many newspapers were sold on Friday?

Final Answer:

e =  1200

Step-by-step explanation:

$$\begin{gathered} b=1680 \\ a=50+b=50+1680=1730 \\ c=b=1680 \\ d=2\cdot b=2\cdot 1680=3360 \\ a+b+c+d+e=9650 \\ 1730+1680+1680+3360+e=9650 \\ e=1200 \end{gathered}$$

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