X:18=2:3 6:x=3:7 5:9=15:x 12:7=60:x

Question

X:18=2:3

6:x=3:7

5:9=15:x

12:7=60:x

Answer 1

"крест на крест"
1- x= 18*2/3=12
2- x=6*7/3=14
3- x=15*9/5=27
4- x=60*7/12=35

Answer 2

Х =2×18÷3=12
х = 6×7÷3= 14
х=15×9÷5=27
х=60×7÷12=35