Let x be the number of children in the park. Then the number of adults is (374-x), according to the condition. Further, the condition says that= . To solve this equation, cross multiply and then simplify 7*(374 - x) = 15x 7*374 - 7x = 15x 7*374 = 15x + 7x 7*374 = 22x x = = 119. ANSWER. There are 119 children in the park.