Answer:
1. 39N=26×3
39N=78
N=78÷39
N=2
2. 18N=54
N=54/18
N=3
3. 9×147=7N
1323=7N
N=1323/7
N=189
4. 39N=26×3
39N=78
N=78÷39
N=2
Let x be the missing term
5. 10:8=15:12
10×12=X15
120=X15
X=120/15
X=8
Let x be the missing term
6. 50/1=100/2
50×2=1X
100=1X
X=100/1
X=100
