100
x + 4 = 25
What is 21
100
m + 3.7 = 12.9
What is 9.2
200
a + 13 = 20
What is 7
200
x + 66.09 = 102.8
What is 36.71
300
k + 83 =121
What is 38
400
x + 36 = 100
What is 64
400
x - 327 = 611
What is 938
400
28 = a/13
What is 364
400
c/0.29 = 5.5
What is 1.595
500
27 = c + 27
What is 0
500
a + 63 = 392
What is 455
500
80 = x/15
What is 1200
500
0.12 = y/0.12
What is 0.0144