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Complete the following activity to find...

Complete the following activity to find the selling price of a digital watch.

Let the selling price of an analogue watch be `xrs` and that of digital watch be `yrs`.
From the sale on `1st` day , ____ + ____= 4330 .....`(1)`
From the sale on `2nd` day , _____ + _____ = 7330.....`(2)`
Multiplying equation `(1)` by `2`, 22x+ ______ = 8660 .........`(3)`
Subtracting equation `(2)` from equation `(3)`,
`{:(22x+12y=8660" ...(3)"),(22x+5y=7330" ...(2)"),("- - -"),(bar(" "7y = square" ")" "therefore y = 190 ):}`
The selling price of digital watch is `190rs`.

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