Asked by Angie

when you plug in a=2-3/25b in the equation a-1.2b=-3, what are you supposed to get?
Answered by Anonymous
I got b=-.76, a=2.09 put it all back in and you get 3
Answered by Angie
no, I mean what do you get when you do this: 2 - 0.12b - 1.2b = -3.
Answered by Anonymous
so is that the equation?
Answered by Angie
yes.
Answered by Anonymous
If you want to know what b equals follow these steps:

2-0.1b-1.2b=-3 (original)

-0.1b-1.2b=-3-2 (rearrange things)

1.3b=5 (add each side, negatives cancel out)

5/1.3=b (solve for b)

b=3.85

Answered by Anonymous
Is this the answer you were looking for?
Answered by Angie
no, i got 5/132.
Answered by Becca
what did u you do? I am confused....
Answered by goober
why is Angie always posting things????!!!
Answered by Anonymous
you are right I misread your equation. It was suposed to be 0.12 not 0.1. In that case your answer of 5/1.32 is correct. (I am assuming you forgot the decimal in your last post.)
Answered by Angie
I'm posting things cuz i suck at math.

I did:

2-0.12b-1.2b=-3
2-1.32b=-3
-1.32b=-3-2
-1.32b=-5
b= -5/1 divided by 1 32/100
b=-5/1 divided by -132/1
b=5/1 * 1/132
b=5/132



Answered by Anonymous
If you substitute 5/132 back into the original equation it doesn't work.

You solved and ended up with

1.32b=5

so divide both sides by 1.32 and you get 5/1.32 or 3.79. subsitute it back it in to check your work and it should be correct.
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