五年级数学分数加减法解方程解方程: 1 5 7 1 1 1 --- + x = --- x — --- = --- x +

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五年级数学分数加减法解方程解方程:  1                    5                                  7            1                       1         1   ---   +   x    =   ---                        x —      ---    =    ---             x   +

五年级数学分数加减法解方程解方程: 1 5 7 1 1 1 --- + x = --- x — --- = --- x +
五年级数学分数加减法解方程
解方程:
1 5 7 1 1 1
--- + x = --- x — --- = --- x + --- = ---
2 6 10 5 4 2
请问怎样解答?
有点斜 请见谅 !

五年级数学分数加减法解方程解方程: 1 5 7 1 1 1 --- + x = --- x — --- = --- x +
1/2=3/6,3/6+2/6=5/6 2/6化简为1/3
1/5=2/10,9/10-7/10=2/10=1/5 9/10
1/2=2/4,1/4+1/4=2/4=1/2 1/4