2002
Mathematics
67ca00ce0c643c71d77dee1f
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.THIS WEEK's
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