SOLUTION: Even though I understand the foil process, we were asked a question like this; I have the answer when solving for "a" which is 2, but how on earth did they get the answ

Question 6744: Even though I understand the foil process, we were asked a question like this;

I have the answer when solving for "a" which is 2, but how on earth did they get the answer. HELP! Can you I see the work on this type of problem. Thanks.
Answer by IA(6) (Show Source): You can put this solution on YOUR website!
2a + 3b= 19
5a - 2b= 0
4a+6b=38 (double first equation)
15a-6b=0 (triple second equation)
to cancel out the b add the equations togther.
this gives 19a = 38. divide both sides by 19. a=2.
then substitute 2 into the equation for a and use the same method to solve b.
RELATED QUESTIONS
Hi, I'm stuck and have a test tomorrow which will likely contain a question like this.... (answered by josgarithmetic)

There is a question on the practice Compass test I don't understand. It is; For all... (answered by MathLover1)

I need to know if it is necessary to change the alpha level on the Chi-Square function in (answered by stanbon)

I really don't understand the process for solving this type of problem. I've got all... (answered by solver91311)

I have a question and hope it does not seem like a silly one. I am studying quadratic... (answered by algebrahouse.com)

hey this is my question. I have asked around and all i got were answers that were way to... (answered by solver91311)

Quick question. 23-(x-7) Trying to understand how this is solved. I know the... (answered by josgarithmetic)

Though this question is not out of our textook, it is based on Chapter 6. We are studying (answered by edjones)

this question is not from the book even though i put in the imformation. its from a... (answered by stanbon)