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प्रश्न
Seven times a number is 12 less than thirteen times the same number. Find the number.
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उत्तर
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 required number is 2.
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______ is the solution of the equation 3x – 2 = 7.
In natural numbers, x – 5 = –5 has ______ solution.
The solution of the equation x + 15 = 19 is ______.
If `9/5x = 18/5`, then x = ______.
Match each of the entries in Column I with the appropriate entries in Column II.
| Column I | Column II |
| (i) x + 5 = 9 | (A) `- 5/3` |
| (ii) x – 7 = 4 | (B) `5/3` |
| (iii) `x/12 = -5` | (C) 4 |
| (iv) 5x = 30 | (D) 6 |
| (v) The value of y which satisfies 3y = 5 | (E) 11 |
| (vi) If p = 2, then the value of `1/3 (1 - 3p)` | (F) – 60 |
| (G) 3 |
