Thursday

January 29, 2015

January 29, 2015

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.

**Answer this Question**

**Related Questions**

Pre-Calc - Solve the system of equations using either the substitution method or...

Algebra - Checking a few answers to some algebra problems: 1.Find the slope of ...

Alegbra - Solve the following systems of equations using the addition (...

Math - solve the system of linear equations using the addition method. Can you ...

math ALGEBRA - Solve by either the substitution method or the addition or ...

need help in math, - Translate to a system of equations and solve using the ...

algebra - System of equations, the addition method 3x-3y=6 3x+3y=0 Whats the ...

Algebra - Solving system of linear equations by using the apropiate method name ...

ALGEBRA - Find the choice below which gives a first step in solving the given ...

Algebra - When solving a system of equations by the addition method, how do you ...