1.If 15% of x= 20% of y then find r: y ?2.3.Twice a number when decrea

1.If 15% of x= 20% of y then find r: y ?2.3.Twice a number when decreased by 7 gives 45 find the number?In the adjoining fig, it is given that AO II CD, OB II CE and ZAOB = 75° findZECD.754.Find the surface area of cube of side 4.2cm?5.6.7.Find the average of 5,10,15,20,25 ?If r: y = 2:1 then find (x² - yº):(rº + y )?Find the successive discounts of 10% and 12% amounts to a single discountSECTION -II (5x2=10 M)Amour any Five of the following.

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Answer:

your answer is here

Step-by-step explanation:

Let the number be x.

twice =2x

When it is DECREASED by 7 we GET the following equation:

2x−7=45

⇒2x=45+7

⇒2x=52

⇒x=

∴x=26

The number is 26.