果园里有梨树、桃树、核桃树共263棵,梨树比桃树的2倍多12棵,核桃树比桃树少9棵。求梨树、桃树及核桃树各有多少棵?( ) A. 142,65,56 B...

作者: tihaiku 人气: - 评论: 0
问题 果园里有梨树、桃树、核桃树共263棵,梨树比桃树的2倍多12棵,核桃树比桃树少9棵。求梨树、桃树及核桃树各有多少棵?( ) A. 142,65,56 B. 150,61,52 C. 144,64,55 D. 140,66,57
选项
答案 A
解析 A [解析]假设桃树有x棵,则梨树有2x+12棵,核桃树有棵,则有:x+2x+12+x-9 = 263 解得;x=65,则梨树有142棵,核桃数有56棵。
更多 网友评论0 条评论)
暂无评论
错误啦!

错误信息

  • 消息: [程序异常] : MISCONF Redis is configured to save RDB snapshots, but it's currently unable to persist to disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
  • 文件: /twcms/kongphp/cache/cache_redis.class.php
  • 位置: 第 85 行
    <?php echo 'KongPHP, Road to Jane.'; ?>