Question

20. Amina thinks of a number
and subtract 4/3 from it. She
multiplies the result by 9. The
result now obtained is 3 times
the same number she thought
of. What is the number?
a.2
b.3
c.4​

Answer 1

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let the number be x

(x - 4/3 )× 9 = 3x

(x-4/3)9= 3x

(9x-12)=3x

-12= -6x

-12/-6= x

x= 2

Answer 2

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Amina thinks of a number and subtracts 5/2 from it. She multiplies the result by 8. The result now obtained is 3 times the same number she thought of. What is the number?

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Let the number she thought be x

ATQ ,she subtract the 5/2 from the no.= x-5/2

She multiply the result by 8 =8(x-5/2)

Solution:-

• 3x = 8(x-5/2)
• 3x=8x -20
• 20=5x
• X=4

So, the number she thought is 4.

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