.
简化 3(x + 3) = x + -14 重新排序条件: 3(3 + x) = x + -14 (3 * 3 + x * 3) = x + -14 (9 + 3x) = x + -14 重新排序条件: 9 + 3x = -14 + x 解: 9 + 3x = -14 + x 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 '-1x' 到方程的每一侧. 9 + 3x + -1x = -14 + x + -1x 结合相似条件: 3x + -1x = 2x 9 + 2x = -14 + x + -1x 结合相似条件: x + -1x = 0 9 + 2x = -14 + 0 9 + 2x = -14 增加 '-9' 到方程的每一侧. 9 + -9 + 2x = -14 + -9 结合相似条件: 9 + -9 = 0 0 + 2x = -14 + -9 2x = -14 + -9 结合相似条件: -14 + -9 = -23 2x = -23 两边除以 '2'. x = -11.5 简化 x = -11.5
.
条评论