Posted by **Margie** on Saturday, October 14, 2006 at 4:04pm.

Solve the system of equations using the Addition method.

2a + 3b = -1

3a + 5b = -2

Margie:

Roger's answer below is correct. If you don't understand it, please try and tell us what you don't understand.

He makes it sound so strange can you ask him to explain in an easier way?

What Roger showed you is this:

When you have 2 equations with 2 "unknowns" (in this case, a and b are unknowns), you have to make one of the unknowns go away. So, you have to figure out how to make one of the unkowns go away. Let's pick the a. How do you make the a's go away? If you add the 2 equations together, you see that the a's don't go away, it leaves you with 5a. If you subtract the bottom equation from the top, you see that the e's still don't go away, because that leaves you with -a. So, the only way to make the a's go away is to multiply the top equation by -3, and the bottom equation by 2. When you do this, you get -6a in the top equation, and 6a in the bottom. Then, when you add the equations together, the a's go away! Now you're just left with the b's to deal with.

Does this make sense??

YES!!!Thank you,you make sense.

## Answer This Question

## Related Questions

- Pre-Calc - Solve the system of equations using either the substitution method or...
- Algebra 2345678!! - Solve the system of equations using the Addition method. 2a...
- Math - solve the system of linear equations using the addition method. Can you ...
- Algebra - Checking a few answers to some algebra problems: 1.Find the slope of ...
- Algerbra - Q1. Solve the system of equationd by addition method. -2x+y=6 -3x-4y=...
- Algebra - solving linear equations w/ substitution - The question in the book ...
- Linear Equations - Can you please help solve this equation using the ...
- algebra - Solve the system of equations using the addition (elimination) method...
- Algebra - Can someone please help solve this? Solve by using addition or ...
- math written assignment help - A’s DJ service charges a $200 setup fee and $75...

More Related Questions