Question

y=7x-6

When y=0 x=?

Answer 1

When y = 0, then

7x -6 = 0
Add 6 to both sides of the equation, and then divide both sides by 7. What does that give you?

Hint: x will be a fraction in this case.

Whenever you perform the same algebraic operation to both sides of an equation, you end up with another valid equation. Learn how to do that and you have understood about half of the algebra you need.