# What is the solution to the system of equations: #6=-4x+y, -5x-y=21#?

##### 1 Answer

Nov 23, 2016

#### Explanation:

#6=-4x+y# #-5x-y=21#

From the first equation we can determine a value for

Add

In the second equation, substitute

Open the brackets and simplify. The multiplication of a negative and a positive results in a negative.

Add

Divide both sides by

In the first equation, substitute

Open the brackets. The multiplication of two negatives results in a positive.

Subtract