Question

3b-2=7b+4

what I have is..please tell me if im correct.
3b-2=7b+4
+2
3b=7b+6
-7b
-4b=6
1-4
b=(6/-4)=31-2

Answer 1

yes that´s correct

Answer 2

First, what does "31-2" mean? Very odd-looking.
Second, what does "1-4" mean. Very odd-looking.
Third, and this will be hard. There is no actual reason for the "b" to end up on the left. b = 3 is no better or worse than 3 = b. You can use this to your advantage and make your life a little simpler.

3b-2=7b+4

Subtract 3b

-2 = 4b + 4

Subtract 4

-6 = 4b

Divide by 2 (Just to simplify)

-3 = 2b

Divide by 2

-3/2 = b

You appear to have the correct answer, but it is very difficult to see how you gto there. Try to be more clear and systematic.

Answer 3

I agree with @tkhunny

Answer 4

It's probably also important to point out that there is only a visual difference between these expressions: \(-\dfrac{3}{2} = \dfrac{-3}{2} = \dfrac{3}{-2} = -\dfrac{-3}{-2}\)

Answer 5

3b-2=7b+4 (group by like terms)
3b-7b=4+2
-4b=6 (divide both sides by -4b to get b on its own)
b=-6/4 (you can reduce this so you get..0
b=-3/2

Answer 6

The in-line notation needs a little help. -3/-2 is troubling. Clarify with parentheses. -3/(-2). It's kind of cute that the leading negative sign is ambiguous. Is it in front of the whole thing or just the numerator? It doesn't matter!

Answer 7

thank you all for your help