Posted by Kevin on Thursday, February 26, 2009 at 8:31am.
solve system of equation
- algebra - Reiny, Thursday, February 26, 2009 at 8:41am
I would use elimination and start with the z's
Add the first plus the second to get
10x - y = -48
Double the second and add it to the third to get 13x - 5y = -55
ahhh, changed my mind, let's now switch to substitution
from above 10x - y = -48 or
y = 10x + 48
sub that into
13x - 5y = -55
13x - 5(10x + 48) = -55
etc. (I got x=5)
I am sure you can finish it from here.
- algebra - Kevin, Thursday, February 26, 2009 at 8:57am
I am coming up with (-5,-2,4) for my answer and I see you x=5
- algebra - Reiny, Thursday, February 26, 2009 at 10:20am
You can tell your answers are correct by merely subbing them back into the 3 original equations, they work
Answer This Question
More Related Questions
- Algebra - Solve the system of equation by graphing. Then classify the system. 3x...
- Algebra 1 - What is an equation of a line perpendicular to the line with ...
- Algebra - Explain how you can determine from the graph of a system of two linear...
- Algebra Multiple Choice - Hello, This is the last of questions I have for my ...
- Math- Algebra - hi wat method would i use and how would i solve this system of ...
- Algebra - To solve the system of equations, which expression could be ...
- algebra - my question is this how do you solve this equation? x=3y-1 x+2y=9 ...
- Algebra - Show equation AX=B represents a linear system of two equations in two ...
- ALGEBRA 1!PLZ HELP! - Use the Substitution method to solve the system of ...
- math - Please explain in detail how to solve each question: At a certain high ...