在今年抗震赈灾活动中，小明统计了自己所在的甲、乙两班的捐款情况，得到三个信息：（1）甲班捐款2500元，乙班捐款2700元；（2）乙班平均每人捐款数比甲班平均每人捐款数多；（3）甲-七年级数学

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• 方程的解是.-八年级数学
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• 解方程：-九年级数学
• 解方程：-九年级数学
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