Half of a herd of deer grazing in the field and three fourths of the remaining are playing nearby. The rest are drinking water from the pond. Find the number of deer in the herd?
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Total number of deer in the herd be x
deer grazing in the field = 1/2 *x
deer playing nearby = 3/4 * x/2 = 3x/8
number of deer drinking water = 9
x/2 + 3x/8 + 9 = x
4x + 3x + 72 / 8 = x
7x + 72/8 = x
7x + 72 = x * 8
7x + 72 = 8x
72 = 8x - 7x
72 = x
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