Question

{x = -4y - 19

{2x + 2y = 4
Solve the linear system of equations using either the substitution or linear combination method.

* SHOW YOUR WORK
* correct answers for both x and y

Answer 1

x = 9

y = -7

Explanation:

x = -4y - 19

2x + 2y = 4

2(-4y - 19) + 2y = 4

-8y - 38 +2y =4

-6y = 4 + 38

-6y=42

y= -7

x = -4(-7) -19

x = 9

Answer 2

x = 9 and y = -7

Explanation:

given:

• x = -4y - 19
• 2x + 2y = 4

using substitution method:

2(-4y - 19) + 2y = 4

-8y - 38 + 2y = 4

-6y = 42

y = -7

Solve for x:

x = -4(-7) - 19

x = 28 - 19

x = 9