100
x + 4 = 25
What is 21
100
m + 3.7 = 12.4
What is 8.7
200
a + 13 = 30
What is 17
200
x - (66.09) = 102.8
What is 168.89
300
k - (83) =121
What is 204
400
x + 36 = 100
What is 64
400
x - 327 = 665
What is 992
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 - (163) = 392
What is 555
500
80 = x/15
What is 1200
500
0.12 = y/0.12
What is 0.0144