Q70 of 107 Page 104

Seven times a number is 12 less than thirteen times the same number. Find the number.

Let the number be x.


Then, seven times of this number = 7x and thirteen times of this number = 13x


According to the question,


⇒ 13x – 7x = 12


⇒ 6x = 12


⇒ x = 2 [dividing both sides by 6]


Hence, the number is 2.


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