Addition
x + 5 = 25
What is 20
x - 3 = 6
What is 9
a + 10 = 100
What is 90
d - 10 = -9
What is 1
x + 66.09 = 102.8
What is 36.71
n + (-3) = -14
What is -11
k - 82 =122
What is 204
x + (-14) = -99
What is -85
x - 321 = -661
What is -340
-35 = c + 35
What is -70
a - (-20) = 31
What is 11
0.12 = y/0.12
What is 0.0144