Question

How do you use the substitution method to solve `y=6x+5, 6x-y=7`?

Answer 1

This system has no solutions. See explanation.

Explanation:

The variable `y` is calculated in the first equation, so we can substitute it to the second:

`6x-(6x+5)=7`

`6x-6x-5=7`

`-5=7`

This equation is false, so the starting system has no solutions.