passpadi

2002

Mathematics

JAMB

If -2 is the solution of the equation 2x + 1 - 3c = 2c + 3x - 7, find the value of c.

A.

4

B.

3

C.

2

D.

1

Correct Answer: 2

Explanation

-2 in the solution implies x = -2. 2x + 1 - 3c = 2c + 3x - 7 2(-2) + 1 - 3c = 2c + 3(-2) - 7 -4 + 1 - 3c = 2c - 6 - 7 -3 + 13 = 2c + 3c ⟹ c = 2.

-2 in the solution implies x = -2. 2x + 1 - 3c = 2c + 3x - 7 2(-2) + 1 - 3c = 2c + 3(-2) - 7 -4 + 1 - 3c = 2c - 6 - 7 -3 + 13 = 2c + 3c ⟹ c = 2.
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