Addition
x + 3 = 10
What is 13
x - 2 = 6
What is 8
6 + a = 18
What is 12
d - 7 = 9
What is 16
n + 12 = 32
What is 20
k - 18 = 76
What is 94
x + 36 = 128
What is 92
x - 327 = 665
What is 338
378 = c + 165
What is 213
a -289 = 392
What is 681