# How do solve the following linear system?: #-7x + y = -19 , -2x + 3y = -19 #?

##### 1 Answer

Jan 9, 2016

#### Explanation:

For a linear system with 2 different unknowns, we use

**Substitution Equation** to find the actual value of the unknown.

There are two unknowns,

Firstly, let **Equation 1**

and **Equation 2**.

From one of the equation, for example **Equation 1** we can rearrange a new equation and substitute it into the other equation.

Let say, from **Equation 1**,

Rearrange the equation in terms of only one unknown.

**Equation 3**

Substitute **Equation 3** into **Equation 2** and we will get;

Substitute **Equation 3** and we will get;