Question

8m-16 ÷ 3m-6
-20 40

Answer 1

I am not sure I understand you question - can you please clarify?

Answer 2

is this:\[(8m-16)\div(3m-6)\]with two choices for the answer: -20 or 40?

Answer 3

no the 20 should have a line above it but under the 8m-16 and the same with the 40 and 3m-16

Answer 4

ok, so question is:\[\frac{8m-16}{20}\div\frac{3m-6}{40}\]correct?

Answer 5

yes it wouldnt let me type it like that but thats correct

Answer 6

ok, do you the rule for dividing fractions? i.e. this rule:\[\frac{a}{b}\div\frac{p}{q}=\frac{a}{b}\times\frac{q}{p}\]

Answer 7

*do you know the rule...

Answer 8

yes

Answer 9

so we can make use of this to get:\[\frac{8m-16}{20}\div\frac{3m-6}{40}=\frac{8m-16}{20}\times\frac{40}{3m-6}\]

Answer 10

you can also factorise a bit to get:\[\frac{8m-16}{20}\times\frac{40}{3m-6}=\frac{8(m-2)}{20}\times\frac{40}{3(m-2)}\]

Answer 11

you now be able to cancel some things out.
are you able to work it out yourself from here?

Answer 12

ok once i cancel out the m-2 i get lost

Answer 13

bec ause the 20 is negative

Answer 14

ok, let me show you the steps...

Answer 15

oh - so the equation I wrote was not correct?

Answer 16

im sorry i thought u put a -20

Answer 17

are you saying it should be:\[\frac{8(m-2)}{-20}\times\frac{40}{3(m-2)}\]

Answer 18

yes

Answer 19

ok , I'll try and illustrate the steps to you...