# How do you solve #2x+y=0# and #x-y=1# using substitution?

##### 2 Answers

Jun 16, 2016

#### Explanation:

Write one of the equations with a single variable as the subject.

This could be :

I would use the fact that both equations can be written with y as the subject.

As

Now that we know the value of

Jun 16, 2016

From

Now,put