# How do you solve the system of equations #4x-y = -14# and #y = 4x+14# by substitution?

##### 1 Answer

Jan 16, 2016

Solution: Infinitely many solutions

#### Explanation:

Given :

First of all substitution aka "replace" one variable with the given equation.

In this case, we replace the second equation for

#=> -14= -14#

**This implied the system have infinitely many solutions** , and it's consistent. In another word, when graph both equations , both line will overlapped each other at all points.

Further more, we can write this answer as follow

Let's