a – 12 = 62 – 27
a = – 27 + 62 + 12
a = 47
77 – c = 55 – 22
– c = – 22 + 55 – 77
-c = -44
c = 44
9 + x = 68 – 50
x = – 50 + 68 – 9
x = 9
a – 12 = 62 – 27 a = – 27 + 62 + 12 a = 47 77 – c = 55 – 22 – c = – 22 + 55 – 77 -c = -44 c = 44 9 + x = 68 – 50 x = – 50 + 68 – 9 x = 9
a – 12 = 62 – 27
a = – 27 + 62 + 12
a = 47
77 – c = 55 – 22
– c = – 22 + 55 – 77
-c = -44
c = 44
9 + x = 68 – 50
x = – 50 + 68 – 9
x = 9
a – 12 = 62 – 27 a = – 27 + 62 + 12 a = 47 77 – c = 55 – 22 – c = – 22 + 55 – 77 -c = -44 c = 44 9 + x = 68 – 50 x = – 50 + 68 – 9 x = 9