If 1400 x x = 1050. Then, x = ?

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Question:
If 1400 x x = 1050. Then, x = ?

[A].

1
4

[B].

3
5

[C].

2
3

[D].

3
4

Answer: Option D

Explanation:

1400 x x = 1050      x = 1050 = 3
1400 4