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Angles of a parallelogram

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by harsh.champ » Wed Feb 17, 2010 4:45 am
Two adjacent angles of a parallelogram are (2x+5)degrees and (3x-5)degrees.The value of x is:

(A)28
(B)30
(C)32
(D)36
(E)42
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by ajith » Wed Feb 17, 2010 4:49 am
harsh.champ wrote:Two adjacent angles of a parallelogram are (2x+5)degrees and (3x-5)degrees.The value of x is:

(A)28
(B)30
(C)32
(D)36
(E)42
2x+5 + 3x-5 = 180 (adjacent angles of a parallelogram adds to 180 degree)

5x = 180

[spoiler]x = 36, D[/spoiler]
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