PC and laptop

A person spent Rs 50000 to purchase a desktop computer and a laptop computer. He sold the desktop at a 20% profit and the laptop at a 10% loss. If, overall, he made a 2% profit, then find the purchase price, in rupees, for the desktop.

Correct answer:

d =  21666.6667

Step-by-step explanation:

r1=100%+20%=1+10020=1.2 r2=100%10%=110010=0.9 r3=100%+3%=1+1003=1.03  50000=d+l 50000 r3=d r1+l r2 50000=d+l 50000 1.03=d 1.2+l 0.9  d+l=50000 1.2d+0.9l=51500  Pivot:Row1Row2 1.2d+0.9l=51500 d+l=50000  Row21.21 Row1Row2 1.2d+0.9l=51500 0.25l=7083.33  l=0.257083.33333323=28333.33333326 d=1.2515000.90000000000146l=1.2515000.9 28333.33333326=21666.66666674=21666.6667  d=36500021666.666667 l=38500028333.333333

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