HOW DO you figure this out??

Question

i am havign a HORRIBLE time with this math class and am just not getting it. I'm trying to understand how to figure this stuff out,. what about longer problems like this one:

-2a + 4 + 3a = 5 - 26

How do you figure this out?

Answer 1

Okay it is very simple. First you try to simplify things by combining like terms. -2a and 3a are like terms because they both have the variable a. -2a+3a=1a.

Your equation should now look like this:

a+4=5-26

The next part is very easy. Again you try to simplify things. 5-26=-21.

a+4=-21

Now you have to get a by itself. So you subtract 4 from both sides.

a=negative 25

Answer 2

First, combine like terms on the left and right sides.
(-2a+3a= a) and (5-26=-21) so that you now have:
a+4 = -21
Now, subtract 4 from both sides so that a = -25

Answer 3

-2a + 4 + 3a = 5 - 26
Step 1: Combine like terms (anything that has the the same variable or no variable)
a+4= -21
then subtract both sides by 4 to get the variable bu itself on one side of the = sign.
a= - 25

Answer 4

-2a + 3a = 5 - 26-4
a=-25

Answer 5

can someone please help me on my cosine and sine word problems?

here are the links:
1.http://answers.yahoo.com/question/index;_ylt=Ai88T1YzdMEP1FpPggeySqjsy6IX;_ylv=3?qid=20071111082753AAUTVZI

2.http://answers.yahoo.com/question/index;_ylt=Au6UZFmxDf18ei6WBoRLsH_sy6IX;_ylv=3?qid=20071111082314AATRpKL

3.http://answers.yahoo.com/question/index;_ylt=AkWJnBb9kHZlneH1J4CcU3jsy6IX;_ylv=3?qid=20071111081539AALWwU1


Thanks! It would be nice if someone helped...Cheers