Wednesday

September 17, 2014

September 17, 2014

Posted by **jririfi** on Sunday, July 20, 2014 at 3:04pm.

3x – y = –12

x + 2y = –18

- Math -
**Reiny**, Sunday, July 20, 2014 at 3:22pmdouble the first:

6x - 2y = -24

x + 2y = -18

add them:

7x = -42

x = -6

back into the second:

-6 + 2y = -18

2y = -12

y = -6

x = -6 , y = -6

**Answer this Question**

**Related Questions**

math 20 system of equations - I have been solving system of equations ...

math,help - can someone explain to me also how to do addition with equations. ...

Math - Write two equations that have your two integers as solutions. Show how ...

Algebra - When solving a system of equations by the addition method, how do you ...

Algebra - When solving a system of equations by the addition method, how do you ...

Math - I am stuck on trying to figure out how to do this question. Could someone...

Algebra II - What is the first step for solving this system by substitution? DO ...

Math 116 - Consider the following system of equations. y=2x-2 y-2x=9 What can ...

Very easy math - my teacher told me that the inverse of addition was subtraction...

math - Consider the following system of equations. y = 2x - 2 y - 2x = 7 What ...