Friday

January 30, 2015

January 30, 2015

Posted by **sandra** on Saturday, April 7, 2012 at 9:02pm.

2x+2y=1

3x-y=6

thanks

- math -
**Joe**, Saturday, April 7, 2012 at 9:06pm2x+2y=1

This one is obvious. Just divide the coefficients by each other, and take any inequalities and subtract them by themselves.

3x-y=6

This one is a bit tougher. First, you need to square everything. Then add 4, subtract 7, and take the square root of it all. It may not seem right, but it IS fairly complex.

- math -
**Anonymous**, Saturday, April 7, 2012 at 9:09pm2x+2y=1

6x-2y=12

-4x=-11

x= 11/4

2(11/4)+2y=1

1-22/4=2y

-18/4=2y

-18/8=y

- math -
**Reiny**, Saturday, April 7, 2012 at 10:36pm1st equation ---> 2x + 2y = 1

2nd equation times 2 ---> 6x - 2y = 12

add them

8x = 13

x = 13/8

sub into 1st:

2(13/8+ 2y = 1

2y = 1 - 13/4

2y = -9/4

y = -9/8

x = 13/8 , y = -9/8

**Answer this Question**

**Related Questions**

Math - Use linear combinations to solve the system of linear equations. 5x=4y-30...

Math - use linear combinations to solve the system of linear equations. 2x+y=4 x...

math - PLEASE!!!!i need help on these 4: *4y=15-3x 2y=3x+21 *4x=5y-14 y=-6x-9 *...

math - PLEASE!!!!i need help on these 4: *4y=15-3x 2y=3x+21 *4x=5y-14 y=-6x-9 *...

math - i only need help on these two: *2/3y=10+4x 5x=1/3y-8 *5x=4y-30 2x+3y=-12 ...

Algebra - solving linear equations w/ substitution - The question in the book ...

MATH - system of linear equation The sum of 3 numbers is 14 the largest is 4 ...

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

linear algebra - Use an inverse matrix to solve each system of linear equations...

linear algebra - Use an inverse matrix to solve each system of linear equations...