Answer:
3. 5х-7=6х
5х-6х=7
-х=7
х=-7
4. 5:7
5x and 7x
7x-5x=18
2x=18
x=18:2
x=9
5. 2.1, 2.2, 2.3, 2.4
Step-by-step explanation:
I hope this helps
here is the answer
sorry , I don't know about others
