Check: 3(6+9) = 315 = 45
Check: 7*3 - 15 = 21 - 15 = 6
Check: 12 - 40/5 = 12 - 8 = 4
Check: 20/(45/9) = 20/5 = 4
Check: (30-12)/2 = 18/2 = 9
Check: (9*3 + 37)/8 = (27 + 37)/8 = 64/8 = 8
Check: 35/7 + 6 = 5 + 6 = 11
Check: (25/5 + 3)6 = (5 + 3)6 = 8*6 = 48
Check: 50 - 9*3 = 50 - 27 = 23
Check: (9*6 - 14)/4 = (54 - 14)/4 = 40/4 = 10
Check: (4 + 68)/8 = 72/8 = 9
Check: 56/(36/4 - 2) = 56/(9 - 2) = 56/7 = 8
18 + 3a = 45
3a = 27
a = 9
Check: 3(6+9) = 315 = 45
7b - 15 = 67b = 21
b = 3
Check: 7*3 - 15 = 21 - 15 = 6
12 - 40:k = 412 - 40/k = 4
12 = 4 + 40/k
8 = 40/k
k = 40/8
k = 5
Check: 12 - 40/5 = 12 - 8 = 4
20/(x/9) = 420 * 9/x = 4
180/x = 4
180 = 4x
x = 45
Check: 20/(45/9) = 20/5 = 4
(30-n)/2 = 930 - n = 18
n = 12
Check: (30-12)/2 = 18/2 = 9
(9t + 37)/8 = 89t + 37 = 64
9t = 27
t = 3
Check: (9*3 + 37)/8 = (27 + 37)/8 = 64/8 = 8
35/y + 6 = 1135/y = 5
y = 7
Check: 35/7 + 6 = 5 + 6 = 11
(m/5 + 3)*6 = 48m/5 + 3 = 8
m/5 = 5
m = 25
Check: (25/5 + 3)6 = (5 + 3)6 = 8*6 = 48
50 - 9a = 23-9a = -27
a = 3
Check: 50 - 9*3 = 50 - 27 = 23
(9t - 14)/4 = 109t - 14 = 40
9t = 54
t = 6
Check: (9*6 - 14)/4 = (54 - 14)/4 = 40/4 = 10
(4 + x)/8 = 94 + x = 72
x = 68
Check: (4 + 68)/8 = 72/8 = 9
56/(36/k - 2) = 856 = 8(36/k - 2)
7 = 36/k - 2
9 = 36/k
4 = k
Check: 56/(36/4 - 2) = 56/(9 - 2) = 56/7 = 8