# Rearranging Formulae HelpWatch

#1
Please explain how to do this question I'm sure its very easy but I cant recognize where to start.

a/N + b= c/N

You have to make N the subject btw
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3 years ago
#2
(Original post by SpeedyGonzalez)
Please explain how to do this question I'm sure its very easy but I cant recognize where to start.

a/N + b= c/N

You have to make N the subject btw
multiply the equation by N
then it should be obvious
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#3
(Original post by TeeEm)
multiply the equation by N
then it should be obvious
If i multiply both sides I get n(a/n) +b=c
Then I get confused :s
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3 years ago
#4
(Original post by SpeedyGonzalez)
If i multiply both sides I get n(a/n) +b=c
Then I get confused :s
a+bN = c
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#5
(Original post by TeeEm)
a+bN = c
Oh, so when multiplying a/N +b by N the N disappears but a+b is still multiplied by N?
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3 years ago
#6
(Original post by SpeedyGonzalez)
Oh, so when multiplying a/N +b by N the N disappears but a+b is still multiplied by N?
there is no a+b unless you forgot to type brackets
there is a + bn, i.e. 2 different terms
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#7
What is confusing me is that I recognize you have to multiply N on both sides so therefore on one side C is left by itself. However on the other side as you have to do whatever you do to one side to the other I am unsure what to multiply by N or how for that fact. Because on the the other side it is a/N + b, what do I multiply by N? I really appreciate your time and effort by the way.
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3 years ago
#8
(Original post by SpeedyGonzalez)
What is confusing me is that I recognize you have to multiply N on both sides so therefore on one side C is left by itself. However on the other side as you have to do whatever you do to one side to the other I am unsure what to multiply by N or how for that fact. Because on the the other side it is a/N + b, what do I multiply by N? I really appreciate your time and effort by the way.
When you multiply a/N by N you get a

When you multiply b by N you get bN

When you multiply c/N you get c

So you have a + bN = c
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#9
(Original post by TenOfThem)
When you multiply a/N by N you get a

When you multiply b by N you get bN

When you multiply c/N you get c

So you have a + bN = c
Cheers

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