Question

解方程 ①5/11-x=1/5 ②x-7/12=7/18 ③x-7/19=7/19 ④3/14+x=1/2

Answer 1

①5/11-x=1/5

x=5/11-1/5

x=25/55-11/55

x=14/55

②x-7/12=7/18

x=7/12+7/18

x=21/36+14/36

x=35/36

③x-7/19=7/19

x=7/19+7/19

x=14/19

④3/14+x=1/2

x=1/2-3/14

x=7/14-3/14

x=4/14

x=2/7