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Problem 9 - Entrance Test
If 7x + 5 = 3x + 21, find x. / यदि 7x + 5 = 3x + 21, तो x ज्ञात कीजिए।
A. 3
B. 4
C. 5
D. 6
Check Answer
Show Solution
Correct: B
7x - 3x = 21 - 5 → 4x = 16 → x = 4