So x = 7/15+4/15 =13/15.

∫x+ 13/2 1 = 1

∴x=2 1- 13/2 1=7/2 1= 1/3

∫5/ 10+x = 13/ 10

∴x= 13-5/ 10=8/ 10=4/5

x+3/7=6/7

∴x=6-3/7=3/7

All the above problems can be solved by moving terms.