Friday

August 29, 2014

August 29, 2014

Posted by **electra** on Thursday, December 13, 2007 at 6:36pm.

1) -X+8Y=16 2) 4X+5Y=-2 3)4Y=15-3X

3X+4Y=36 5X-4Y=-23 2Y=3X+21

- Algebra HELP -
**bobpursley**, Thursday, December 13, 2007 at 7:50pmI will do one. Then, I will happily critique your thinking on others. Take the third.

4y=15-3x

2y=3x+21

double the second one..

4y=15-3x

4y=6x+42

subtract, then the result is ..

0=9x-45 and solve for x.

**Related Questions**

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 *...

maths - use the substitution method to solve the linear system. 1. 3x=9 -x+2y=9 ...

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

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...

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

algebra - use linear combinations to solve these system. 3x+2y=22 9x-8y=-4