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简化 X2 + x2 = 9.5 解: X2 + x2 = 9.5 求解变量 'X'. 移动所有含x 的放右边,所有其它条件放左边. 增加 '-1x2' 到方程的每一侧. X2 + x2 + -1x2 = 9.5 + -1x2 结合相似条件: x2 + -1x2 = 0 X2 + 0 = 9.5 + -1x2 X2 = 9.5 + -1x2 简化 X2 = 9.5 + -1x2 重新排序条件: -9.5 + X2 + x2 = 9.5 + -1x2 + -9.5 + x2 重新排序条件: -9.5 + X2 + x2 = 9.5 + -9.5 + -1x2 + x2 结合相似条件: 9.5 + -9.5 = 0.0 -9.5 + X2 + x2 = 0.0 + -1x2 + x2 -9.5 + X2 + x2 = -1x2 + x2 结合相似条件: -1x2 + x2 = 0 -9.5 + X2 + x2 = 0 无法确定此方程的解.
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