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If 8x- 4 = 6x- 10, find the value of 5x,

Mathematics
WAEC 1994

If 8x- 4 = 6x- 10, find the value of 5x,

  • A. -35
  • B. -15
  • C. -3
  • D. 3
  • E. 7
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Correct Answer: Option B
Explanation

8x - 4 = 6x - 10

8x - 6x = -10 + 4

2x = -6

x = -3

\(\therefore\) 5x = 5(-3)

= -15

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