If a number is tripled and the result is increased by 5, we get 50. Find the number. - Mathematics

Question

If a number is tripled and the result is increased by 5, we get 50. Find the number.

Sum

Solution

Let the required number be x.
According to the question, the number is tripled and 5 is added to it
∴ 3x + 5
or, 3x + 5 = 50
or, 3x + 5 − 5 = 50 − 5 [Subtracting 5 from both the sides]
or, 3x = 45
or, `(3x)/3=45/3` [Dividing both the sides by 3]
or, x = 15
Thus, the required number is 15.

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Use of Variables in Common Rules

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Chapter 9: Linear Equation in One Variable - Exercise 9C [Page 144]

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RS Aggarwal Mathematics [English] Class 6

Chapter 9 Linear Equation in One Variable
Exercise 9C | Q 6 | Page 144

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