Sunday
April 20, 2014

Homework Help: Algebra 2345678!!

Posted by Margie on Saturday, October 14, 2006 at 3:55pm.

Solve the system of equations using the Addition method.

2a + 3b = -1
3a + 5b = -2


The addition method tells you to find common multiples of a coefficient, then add the equations together to eliminate a variable.
If you multiply the first equation by 3 and the second by -2 you have
2a + 3b = -1
3a + 5b = -2
becomes
3 (2a + 3b = -1)
-2(3a + 5b = -2)
which is
6a + 9b = -3
-6a-10b = 4
Now add together to get
-b=1 or b=-1
Now substitute into either equation and solve for a.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

algebra - 1 Solve the set of linear equations by the matrix method : a+3b+2c=3...
DanH-Algebra 1 - Solve the system of equations using the Addition method. 2a + ...
Algebra - Checking a few answers to some algebra problems: 1.Find the slope of ...
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 ...
maths - (Q1)a+3b+2c=3,2a-b-3c=-8,5a+2b+c=9.solve for a,b&c by matrix method. (a)...
Math - solve the system of linear equations using the addition method. Can you ...
algebra - Explain why the addition method might be preformed over the ...
Maths - Using a cramers and guassian elimination method solve this; a+2b+3c=600 ...
ALGEBRA - Find the choice below which gives a first step in solving the given ...

Search
Members