# How do you solve the following equations by substitution: #8x - 4y = 16# and #y = 2x - 4?#?

##### 1 Answer

Oct 21, 2015

There are infinitely many solutions to this pair of equations. (See below for demonstration using substitution).

#### Explanation:

Given:

[1]

[2]

**Substituting**

[3]

Simjplifying

[4]

Since this is true for all pairs **no unique** solution.

(The equations represent the same line).