## Dani101 3 years ago How do you do y=x-v/b

1. AEB047

for what variable?

2. Dani101

For x

3. jim_thompson5910

Is the equation $\Large y = \frac{x-v}{b}$ OR $\Large y = x-\frac{v}{b}$ ??

4. Dani101

the first one

5. jim_thompson5910

your first step is to multiply both sides by 'b'

6. jim_thompson5910

what do you get when you do this?

7. Dani101

But i thought you cant multiply a different variable with another

8. jim_thompson5910

you can, there's no rule that says you can't

9. jim_thompson5910

x times y is just xy (sure we can't find the numeric value of that, but we can just say it's xy)

10. Dani101

Im confused, so like you multiply b by x and b by v?

11. jim_thompson5910

you just multiply both sides by 'b' to get $\Large y = \frac{x-v}{b}$ $\Large yb = x-v$ what's next?

12. Dani101

oh, um i really don't know, my teacher didn't really explain this to us. Don't you just leave the problem like that since you cant do anything else?

13. jim_thompson5910

no, you can add 'v' to both sides and this completely isolates x

14. jim_thompson5910

$\Large yb = x-v$ $\Large yb+v = x-v+v$ $\Large yb+v = x$ $\Large x = yb+v$

15. jim_thompson5910

and now you're done

16. Dani101

Ohhhh, Thank you very much that was helpful

17. jim_thompson5910

yw