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简化 4x + -6x + 8x = 6x + 36 + -8x 结合相似条件: 4x + -6x = -2x -2x + 8x = 6x + 36 + -8x 结合相似条件: -2x + 8x = 6x 6x = 6x + 36 + -8x 重新排序条件: 6x = 36 + 6x + -8x 结合相似条件: 6x + -8x = -2x 6x = 36 + -2x 解: 6x = 36 + -2x 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 '2x' 到方程的每一侧. 6x + 2x = 36 + -2x + 2x 结合相似条件: 6x + 2x = 8x 8x = 36 + -2x + 2x 结合相似条件: -2x + 2x = 0 8x = 36 + 0 8x = 36 两边除以 '8'. x = 4.5 简化 x = 4.5
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