# How do I rearrange this formula to make P the subject?

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#1
The formula is g = 3/4p + 7 I have gotten up to g - 7 - 3 =/4p but what do I do with the leftover division sign?

Do I multiply or divide here? From there I got it to 4pg - 28p - 12p = 16p by multiplying by 4 on both sides. Then I was going to divide by 16p on both sides to get p alone, however, something tells me this is wrong 😅

0
4 months ago
#2
(Original post by lyonbabe)
The formula is g = 3/4p + 7 I have gotten up to g - 7 - 3 =/4p but what do I do with the leftover division sign?

Do I multiply or divide here? From there I got it to 4pg - 28p - 12p = 16p by multiplying by 4 on both sides. Then I was going to divide by 16p on both sides to get p alone, however, something tells me this is wrong 😅

g = 3/4p + 7

4g = 3/p + 28

4g - 28 = 3/p

(4g - 28)/3 = 1/p

3/(4g -28) = p
1
4 months ago
#3
(Original post by lyonbabe)
The formula is g = 3/4p + 7 I have gotten up to g - 7 - 3 =/4p but what do I do with the leftover division sign?

Do I multiply or divide here? From there I got it to 4pg - 28p - 12p = 16p by multiplying by 4 on both sides. Then I was going to divide by 16p on both sides to get p alone, however, something tells me this is wrong 😅

You got it close. But that just make things out of hand. I would suggest to start from the original formula and use Those (or both) to get your answer. Hint: 4.

(Original post by thrwawy)
.
Hello, thrwawy, as the OP needs help, I would suggest not to give the answer directly. We should be the one who guides them to the correct answer and not do all the work for them as to encourage the OP's learning. Thank you.

*Hold on... I'm a bit confused. Is it 3/4p as in 3 over 4p, or 3 over 4 multiplied by p?*
Last edited by mra1108; 4 months ago
1
#4
"*Hold on... I'm a bit confused. Is it 3/4p as in 3 over 4p, or 3 over 4 multiplied by p?*"

Hiya this is how it was written on the PowerPoint so I am not sure myself
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#5
(Original post by thrwawy)
g = 3/4p + 7

4g = 3/p + 28

4g - 28 = 3/p

(4g - 28)/3 = 1/p

3/(4g -28) = p
Hiya why did you put brackets in? And on the second row where you multiply both sides by 4, why didn't you multiply 3/p by 4?

Thanks
0
4 months ago
#6
(Original post by lyonbabe)
Hiya why did you put brackets in? And on the second row where you multiply both sides by 4, why didn't you multiply 3/p by 4?

Thanks
the brackets are put in because you're dividing both the 4g and the -28 by 3.
On the second line, the 3/p was divided by 4

multiplied by 4 is

this is the same as as the 4's cancel out
1
#7
(Original post by laurawatt)
the brackets are put in because you're dividing both the 4g and the -28 by 3.
On the second line, the 3/p was divided by 4

multiplied by 4 is

this is the same as as the 4's cancel out
Ooh OK thank you very much for explaining that.
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#8
(Original post by mra1108)
You got it close. But that just make things out of hand. I would suggest to start from the original formula and use Those (or both) to get your answer. Hint: 4.

Hello, thrwawy, as the OP needs help, I would suggest not to give the answer directly. We should be the one who guides them to the correct answer and not do all the work for them as to encourage the OP's learning. Thank you.

*Hold on... I'm a bit confused. Is it 3/4p as in 3 over 4p, or 3 over 4 multiplied by p?*
Can I ask what you meant by "those or both"? Thanks
0
4 months ago
#9
If it was 3/4 multiplied by p then it would be 3p/4
0
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