Question

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Answer 1

Answer:

6. Let the number be x.

As per question, we have

3x−5=16

⇒3x=16+5

⇒3x=21

⇒x=7

Therefore, the number is 7.

7. sorry I don't know

8.Let the required number be x

Then, one third of number = 3

3x+x=8

⇒ 3x+3x =8

⇒x+3x=8×3

⇒4x=24

⇒x= 4/24

⇒x=6

∴ Hence, the required number be 6

9.Let an isosceles triangle have equal sides in length of 2x cm

So, x cm be the third side of the triangle

Perimeter of the triangle =30 cm

⇒ x+2x+2x=30

⇒ 5x=30

⇒ x= 5/30

⇒ x=6

Therefore, the required sides of the isosceles triangle are 6,12 and 12 cm

10. sorry I don't know

11. Let x be the number of books

It is given that Amit subtracts thrice the number of books she has from 54

He finds the result to be 6

So,54-3x=6

54-6=3x

48=3x

16=x

Hence, He has 16 notebooks.

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