Question

If `x=2y` into `-4x+11y=15`, what are `x`, and `y`?

Answer 1

`y=5; x=10`

Explanation:

We substitute `x=2y` into `-4x+11y=15`

`-8y+11y=15`

`3y=15`, `y=5`

`x=2y=2xx5=10.`