Question

make v the subject of the formula z = v -1 / v

Answer 1

is it
\[\large z=\frac{v-1}{v}\]?

Answer 2

yes

Answer 3

ok
how would you solve
\[\frac{v-1}{v}=7\]?

Answer 4

not sure.
Z = v - 1 divided by v
how do i get single v?

Answer 5

lets solve
\[\frac{v-1}{v}=7\] first
step one, multiply both sides by \(v\) and get
\[v-1=7v\]

Answer 6

subtract \(v\) get
\[-1=6v\] and so
\[v=-\frac{1}{6}\]

Answer 7

those steps clear? because it will be identical steps for
\[\frac{v-1}{v}=z\] except for one step of combining like terms which is easy with \(7v-v\)

Answer 8

so you make Z a number?

Answer 9

that is what i did to explain the steps
your answer will have a z in it

Answer 10

thank you salellite! that makes sense now.

Answer 11

yw
hope it is more clear than before
it is still a bit complicated when you have to factor out a \(v\) to get your answer

Answer 12

could you help me solve 1 more question?
john is twice as old as mary.
5 years ago he was 3 times as old. what is marys age now.
i understand that J = 2M
and J-5 = 3(m-5)
but how to i factor out J/

Answer 13

you can replace \(j\) by \(2m\) and solve
\[2m-5=3(m-5)\]and now there is no \(j\) in it

Answer 14

Oh! I see now.
Cheers!

Answer 15

cheers!