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2(x-13)+20=x-11
简化 2(x + -13) + 20 = x + -11 重新排序条件: 2(-13 + x) + 20 = x + -11 (-13 * 2 + x * 2) + 20 = x + -11 (-26 + 2x) + 20 = x + -11 重新排序条件: -26 + 20 + 2x = x + -11 组合类似条件: -26 + 20 = -6 -6 + 2x = x + -11 重新排序条件: -6 + 2x = -11 + x 解: -6 + 2x = -11 + x 求解变量 'x'. 移动所有条件 x 到左边,所有其他条件放右边. 添加 '-1x' 到等式的每一边. -6 + 2x + -1x = -11 + x + -1x 组合类似条件: 2x + -1x = 1x -6 + 1x = -11 + x + -1x 组合类似条件: x + -1x = 0 -6 + 1x = -11 + 0 -6 + 1x = -11 添加 '6' 到等式的每一边. -6 + 6 + 1x = -11 + 6 组合类似条件: -6 + 6 = 0 0 + 1x = -11 + 6 1x = -11 + 6 组合类似条件: -11 + 6 = -5 1x = -5 两边除以'1'. x = -5 简化 x = -5
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