In arithmetic mean of 5,7,9x is 9 then the value of x is
Answer
5/3
Steps
(5 plus 7 plus 9x)/3 eq. 9
(12 plus 9x)/3 eq. 9
(12 plus 9x ) eq 3x9 eq 27
12 plus 9x eq 27
9x eq (27-12) eq 15
X eq (15/9) eq 5/3.
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5/3
(5 plus 7 plus 9x)/3 eq. 9
(12 plus 9x)/3 eq. 9
(12 plus 9x ) eq 3x9 eq 27
12 plus 9x eq 27
9x eq (27-12) eq 15
X eq (15/9) eq 5/3.