Answer:

Step-by-step explanation:
General equations are in the form 
So you can add 6 to both sides to make:

Answer:
7/20
Step-by-step explanation:
Answer: X - 6
If you were to write an equation you can use Y to represent Joshua's age, X - 6 = Y
Answer:
3x-8y+40z
Step-by-step explanation: