a) x + 35 = 72
x = 72 - 35
x = 3510 - 610
x = 2910
b) x - 14 = 15
x = 15 + 14
x = 420 + 520
x = 920
c) 2 - x = 47
x = 2 - 47
x = 147 - 47
x = 107