Answer:

Step-by-step explanation:

Adding 10 to both sides.


Adding
to both sides.


Dividing both sides by 10.


∴ 
Answer:
x=1y
Step-by-step explanation:
Answer:
4821
Step-by-step explanation:
Answer:
x+2x+x+10
Step-by-step explanation:
Company A= x
Company B =2x
Company C =x+10