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प्रश्न
If 7x + 4 = 25, then x is equal to ______.
पर्याय
`29/7`
`100/7`
2
3
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उत्तर
If 7x + 4 = 25, then x is equal to 3.
Explanation:
Given equation is 7x + 4 = 25
⇒ 7x = 25 – 4 ...[Transposing 4 to RHS]
⇒ 7x = 21
On dividing the above equation by 7, we get
x = 3
Hence, the solution of the given equation is 3.
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x – ______ = 15; when `x/2` = 6.
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 |
