Tuesday

July 22, 2014

July 22, 2014

Posted by **Emily** on Thursday, January 13, 2011 at 7:49pm.

x - y = -1

3x + 5y = 21

- MATH -
**helper**, Thursday, January 13, 2011 at 8:06pmto Eliminate x

x - y = -1

3x + 5y = 21

multiply (x - y = -1) by -3

-3x + 3y = 3

3x + 5y = 21

add both equations

0 + 8y = 24

8y = 24

y = 3

**Related Questions**

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

Math 1 - Consider the following system of equations. y = 4x - 4 y - 4x = 3 What...

math - Consider the following system of equations. Y = 3x – 7 Y - 3x = 5 a) The ...

PLEASE CHECK - 1.)Solve for y in the following system of equations. x + 4y = -38...

Discrete Math - I am really stuck on these problems. I've worked a lot of them ...

alegebra - solve the system of equations by graphing. then classify the system ...

algebra - solve the system of equations by graphing. Then classify the system as...

Math-System of Equations - 1. Solve for x, y, z in the following system: 2x-3y-2...

Math - A) A rectangle has perimeter 64 cm and area 23 cm^2. Solve the following ...

math - Solve following system of equations? x+3z=-2 2x+2y+z=4 3x+y-2z=5 i need ...