Q80 of 107 Page 104

If 45 is added to half a number, the result is triple the number. Find the number.

Let x be the number. Then, half of the number is


According to the question,


⇒


⇒


⇒ x + 90 = 6x


⇒ 90 = 6x – x


⇒ 90 = 5x


⇒ [divide both side by 5]


⇒ x = 18.


Hence, the number is 18.


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