Raju thinks of a number and subtracts -25from it. He divides the result by 2. The result now obtained is 2 times the number he thought of .What is the number?
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refer the above attachment
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let the number be x
new no x-25 /2
ATQ, x-25/2=2x
x-25=4x
-25=4x-x
-25=-5x
x=-25/-5
5
therefore the number she thought was 5.
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