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简化 X2 + -5x + -48 = 0 重新排序条件: -48 + X2 + -5x = 0 解: -48 + X2 + -5x = 0 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 '48' 到方程的每一侧. -48 + X2 + 48 + -5x = 0 + 48 重新排序条件: -48 + 48 + X2 + -5x = 0 + 48 结合相似条件: -48 + 48 = 0 0 + X2 + -5x = 0 + 48 X2 + -5x = 0 + 48 结合相似条件: 0 + 48 = 48 X2 + -5x = 48 增加 '5x' 到方程的每一侧. X2 + -5x + 5x = 48 + 5x 结合相似条件: -5x + 5x = 0 X2 + 0 = 48 + 5x X2 = 48 + 5x 简化 X2 = 48 + 5x 重新排序条件: -48 + X2 + -5x = 48 + 5x + -48 + -5x 重新排序条件: -48 + X2 + -5x = 48 + -48 + 5x + -5x 结合相似条件: 48 + -48 = 0 -48 + X2 + -5x = 0 + 5x + -5x -48 + X2 + -5x = 5x + -5x 结合相似条件: 5x + -5x = 0 -48 + X2 + -5x = 0 无法确定此方程的解.
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