# subsitution method

Can some one show me how to use the Substitution method to solve the system of these equations.

x + y = -4
x - y = 2

x + y = 10
y = x + 8

on the first set.
Solve for either x or y in either equation, then put that value into the other equation.

Example:
x + y = -4
x - y = 2

solve for x in the first:
x= -y-4
Put it in the second then..
-y-4 -y=2
-2y=6
y=-3
then solve for x..
x=-y-4=-1

1. 👍 0
2. 👎 0
3. 👁 211

## Similar Questions

1. ### Linear Equations

Can you please help solve this equation using the substitution method? I have tried and keep getting that X and Y = 7/2, but the answer in the book states no solution, inconsistent system. What am I doing wrong? Please help! Solve

asked by Mia on March 2, 2010

What advantages does the method of substitution have over graphing for solving systems of equations? Choose the correct answer below. A. Graphing cannot be used to solve dependent or inconsistent systems due to the nature of the

asked by zwgz123 on December 15, 2017
3. ### Pre - CALCULUS

Solve the system by the substitution method. Show your work. 2y - x = 5 x2 + y2 - 25 = 0

asked by Ciara on April 13, 2015
4. ### pre - CALCULUS

Solve the system by the substitution method. Show your work. 2y - x = 5 x2 + y2 - 25 = 0

asked by Ciara on April 13, 2015
5. ### algebra 1

use the substitution method to solve the linear system. 9x+6y=3 3x-7y=-26 please show me an example of how to do it.

asked by aneme on February 12, 2008
1. ### Math

Solve the following system by the substitution method. Show your work. {2x−7y=12−x+3.5y=−6

asked by I Love Beyonce on March 2, 2020
2. ### Algebra II

Solve the given system by using a substitution method 9x-2y=3 3x-6=y If you could show the steps because I have 10 problems for homework and I just need an example Thanks

asked by JessieLynn on February 4, 2011
3. ### Substitution Method-Plz help

Use the Substitution method to solve the system of equations. x + y = -4 x - y = 2 solve for x in the second equation. x= y+2 Put that in for x in the first equation: x+y=-4 (y+2) + y = -4 solve for y. Then, x= y+2 i don't get

asked by Svetlana on October 17, 2006
4. ### Algebra

Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. 4x + 4y = -36 4x + 4y = 12

asked by gina on July 5, 2011
5. ### math

Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. 8y + 2x = 48 2x = 4y – 12

asked by Taina on June 20, 2011
6. ### Algebra

Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. 4x + 4y = -36 4x + 4y = 12

asked by toni on July 3, 2011

More Similar Questions