(4*b-16): 2=10 (2+x: 7)*8=72 35: (15-y: 8)=5 (t*3+5): 4=8

(4 * b - 16) : 2 = 10
4 * b - 16 = 10 * 2 = 20
4 * b = 20 + 16 = 36
b = 36 : 4 = 9

(2 + x : 7) * 8 = 72
2 + x : 7 = 72 : 8 = 9
x : 7 = 9 - 2 = 7
x = 7 * 7 = 49

35 : (15 - y : 8) = 5
15 - y : 8 = 35 : 5 = 7
y : 8 = 15 - 7 = 8
y = 8 * 8 = 64

(t * 3 + 5) : 4 = 8
t * 3 + 5 = 8 * 4 = 32
t * 3 = 32 - 5 = 27
t = 27 : 3 = 9