 
<translate> Ka X bụrụ ọnụọgụ ndị okenye na-aga egwu. Ọnụ ọgụgụ ụmụaka ndị bịara ememe ahụ bụ 3 * X. Ụlọ ihe nkiri ahụ nwetara ngụkọta nke 7 * X + 3 * (3 * X) = $6,000. Ịba ụba site na parentheses anyị na-enweta 7X + 9X = $ 6,000. Ịgbakọta okwu ndị dị ka anyị na-enweta 16X = $6,000. N'ịkewa akụkụ abụọ ahụ site na 16, anyị na-enweta X = 375, ọnụ ọgụgụ ndị toworo eto na-aga egwu. Ọnụ ọgụgụ ụmụaka na-abịa ememe ahụ ji okpukpu atọ karịa nke a: ndị toworo eto 375 * ụmụaka 3 / ndị toworo eto = ụmụaka 1125. Onu ogugu ndi mmadu na-aga egwu egwu bu 375 + 1125 = ndi mmadu 1500. Azịza ya bụ, otu puku na narị ise. <eng> Let X be the number of adults attending the concert. The number of children attending the concert is 3 * X. The theater collected a total of 7 * X + 3 * (3 * X) = $6,000. Multiplying through the parentheses we get 7X + 9X = $6,000. Adding like terms we get 16X = $6,000. Dividing both sides by 16 we get X = 375, the number of adults attending the concert. The number of children attending the concert is triple this number: 375 adults * 3 children / adult = 1125 children. The number of people attending the concert is 375 + 1125 = 1500 people.
The answer: 1500. 