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
Correct Answer: B. -15
Explanation
8x - 4 = 6x - 10
8x - 6x = -10 + 4
2x = -6
x = -3
\(\therefore\) 5x = 5(-3)
= -15
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