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Mathematics 7 Online
Kharma14:

4(2m – 1) = 16

supie3:

I explained this to you twice already- the first step is to distribute \(a(b-c)=ab-ac\) so you would have to distribute \(4(2m – 1)\) \(4 \times 2m = ?\) \(4 \times 1 = ? \)

new2luv:

yes supie thank you

jhonyy9:

@supie3 wrote:
I explained this to you twice already- the first step is to distribute \(a(b-c)=ab-ac\) so you would have to distribute \(4(2m – 1)\) \(4 \times 2m = ?\) \(4 \times 1 = ? \)
attention here 4×(-1) not just 1

supie3:

I thought it was 2m - 1 ?

jhonyy9:

yes so than 4*2m and 4*(-1)

supie3:

but cant i just do \(4~\times~2m~–~4~\times 1\) ?

jhonyy9:

but now i see what is there so 4(2m - 1) = 16 more easy if you divide both sides by 4

supie3:

Oh ok o:

jhonyy9:

\[\frac{ 4(2m -1) }{ 4 } = \frac{ 16 }{ 4 }\]

supie3:

i read the equation wrong-

NevaehJade6219:

1 attachment
supie3:

is that right @jhonyy9 ? 0-0

NevaehJade6219:

its right i promise

supie3:

yeah i think that's right o:

supie3:

you can close this now, @Kharma14

jhonyy9:

@jhonyy9 wrote:
\[\frac{ 4(2m -1) }{ 4 } = \frac{ 16 }{ 4 }\]
from here result 2m -1 = 4 add to both sides 1 and get 2m = 5 divide both sides by 2 and gete m=5/2

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