Question

How do you solve `x-3y=9` and `2x-6y=10` using substitution?

Answer 1

`x = 9 + 3y`

`2(9 + 3y) - 6y = 10`

`18 + 6y - 6y = 10`

`0y = -8`

`y = O/`

Hence, this system has no solution because the two lines are parallel.

Hopefully this helps!