# How do you solve this system of equations: #7x + y = 11;- 10x - 5y = 20#?

##### 1 Answer

Feb 6, 2017

The method I am using is subsitution.

#### Explanation:

First, isolate x in the second equation as it is easier to do so;

Then, replace x in the first equation with the equation above;

Now we know y equals to -10

Now, substitute this value to y of the second equation

And x equals to 3