- #1
Buggsy GC
- 48
- 1
Hello I'm working through transposing formulae of pearsons Anthony Croft and Robert Davidson's foundation maths 5th edition and I'm stuck on exercise 10.1 question 1)e)
We're it states that I must transpose the formula to make x the subject.
The formula is y = ¹/₂x and the answer x = ¹/₂y
I don't understand how they got this answer. As I did the working as
E)y = 1/2x
× 2
(2)(y) = ⁽¹⁾/₍₂₎x × ⁽²⁾/₍₁₎
2y = x
I base this way of a working off another question which I got correct
D)y = (¹)/(₂)(x - 7)
+ 7
y + 7 = ¹/₂x
× 2
(2)(y + 7) = ⁽¹⁾/₍₂₎x × ⁽²⁾/₍₁₎
2y + 14 = x
x = 2y + 14
If I am missing some rule that I'm meant to implement or if there is a error in the textbook your advise would be greatly appreciated.
Yours sincerely Buggsy
We're it states that I must transpose the formula to make x the subject.
The formula is y = ¹/₂x and the answer x = ¹/₂y
I don't understand how they got this answer. As I did the working as
E)y = 1/2x
× 2
(2)(y) = ⁽¹⁾/₍₂₎x × ⁽²⁾/₍₁₎
2y = x
I base this way of a working off another question which I got correct
D)y = (¹)/(₂)(x - 7)
+ 7
y + 7 = ¹/₂x
× 2
(2)(y + 7) = ⁽¹⁾/₍₂₎x × ⁽²⁾/₍₁₎
2y + 14 = x
x = 2y + 14
If I am missing some rule that I'm meant to implement or if there is a error in the textbook your advise would be greatly appreciated.
Yours sincerely Buggsy