37-x=41-23
37-x=18
x=37-18
x=14
37-14=41-23
x+29=63+19
x+29=92
x=92-29
x=53
53+29=63+19
x-23=47+38
x-23=85
x=85+23
x=108
108-23=47+38
37+x=59+27
37+x=86
x=86-37
x=49
37+49=59+27
x+28=81
x=81-28
x=53
53+28=81
27+x=45
x=45-27
x=18
27+18=45
x-13=16
x=16+13
x=29
29-13=16
81-x=26
x=81-26
x=55
81-55=26