Sunday

April 20, 2014

April 20, 2014

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

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.

**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 ...