Addition
b + 14 = 20
b = 6
k - 4 = 11
k = 15
8t = 56
t = 7
v/4 = 5
v = 20
9.9 = x + 5.4
x = 4.5
17 = e + 9
e = 8
15 = h - 7
h = 22
42 = 3p
p = 14
12 = 1/6r
r = 72
11/12 = l + 3/12
l = 2/3
k + 25 = 49
k = 24
y - 90 = 47
y = 137
17u = 51
u = 3
90 = k/2
k = 180
5/12 = 5d
d = 1/12
107 + m = 206
m = 99
j - 3.7 = 20.4
j = 24.1
4w = 6.8
w = 1.7
4/3y = 36
y = 27
2 5/7 = p - 2/7
p = 3
58 = 12.5 + t
t = 45.5
11.2 = f - 1.8
f = 13
3.2d = 40.8
d = 12.75
9/10 = 5/6v
v = 1 2/25
2/3k = 28(4/9)