Let's solve the equation step by step:

The given equation is: $3x + x - 7 = 1$

1. Combine the like terms on the left-hand side: $(3x + x) - 7 = 1 \implies 4x - 7 = 1$

2. Add 7 to both sides to isolate the term with $x$: $4x - 7 + 7 = 1 + 7 \implies 4x = 8$

3. Divide both sides by 4 to solve for $x$: $x = \frac{8}{4} \implies x = 2$

So, the solution is: $x = 2$

Would you like more details on any of the steps or have additional questions?

Here are 5 related questions for you to explore:

1. What happens if the equation is $3x + x - 7 = 0$?
2. How would you solve $5x + 2x - 4 = 10$?
3. Can you solve $4x - 7 = -1$?
4. How do you solve $3x + 2x - 9 = 4x - 2$?
5. What if the equation was $2x + 3 = 3x - 1$?

Tip: Always combine like terms first to simplify equations before solving.