N/4 - 5n/8 = 1/4 6/5 + 5m/9 = 94/ 45 b/2 + 1/5 = 19 172g - 7 = 0.74 25.63 = 5g + 3.68 8n - (3n + 5) = 10 me solve these equations.

N/4 - 5n/8 = 1/4
multiply both sides by the lcm of denomenator 4,8,4 = 8
=2n-5n =2
= -3n =2
n =-2/3

6/5+5m/9=94/45
=5/9m=94/45- 6/5
=5/9m =40/45
Multiply both sides by 9
=5m =40/5
=5m =8
Divide both sides by 5
= m = 8/5

b/2 +1/5 = 19
Multiply both sides by lcm of denominator 2,5 = 10
= 5b+2= 190
5b =190-2
5b=188
Divide both sides by 5
=188/5 or 37.6

172g- 7=0.74
= 172g =0.74+7
=172g=7.74
Divide both sides by 172
g = 0.045

25.63 = 5g +3.68
5g =25.63 -3.68
5g= 21.95
Divide both sides by 5
g = 4.39

8n -(3n +5) = 10
8n- 3n+5 =10
5n+5=10
5n=10-5
5n =5
Divide by 5 both sides
n = 1

I hope I have helped

I think B is correct