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今天,我和同学陈吉萍在解一个一元一次方程时发生了争议,我们都说自己的结果是正确的,谁也不能说服谁.于是我们找到了数学老师,要老师为我们评判.题目解方程:2x-3/0.5-x+1/0.2=3.我的解法:原方程可化为20x-30/5-10x+10/2=30.去分母,得2(20x-30)-5(10x+10)=300.去括号,得40x-60-50x-50=300.移项、合并同类项,得-10x=410.系数化为1,得x=-41.陈吉萍的解法:原方程可化为20x-30/5-10x+10/2=3.去分母,得2(20x-30)-5(10x+10)=30.去括号,得40x-60-50x-50=30.移项、合并同类项,得-10x=140.系数化为1,得x=-14.
Today, when I and my classmate Chen Jiping argued about a one-dollar equation, we all said that our result was correct and no one could convince anyone. So we found a math teacher and asked the teacher to judge us. Problem Solution Equation: 2x-3 / 0.5-x + 1 / 0.2 = 3. My solution: The original equation can be changed to 20x-30 / 5-10x + 10/2 = 30. To the denominator, we get 2 (20x-30) -5 10x + 10) = 300. To the brackets, get 40x-60-50x-50 = 300. Shift, the merger of similar items, have -10x = 410. The coefficient of 1, x = -41. Chen Jiping solution: the original The equation can be changed to 20x-30 / 5-10x + 10/2 = 3. To the denominator, get 2 (20x-30) -5 (10x + 10) = 30. To bracket, get 40x-60-50x-50 = 30. Move items, merge the same items, get-10x = 140. The coefficient is 1, get x = -14.