Rearrange the formula to make 'y' the subject: x = (1 - 2y)/(3 +4y)

Ok so we need to get 'y' by itself on the left hand side of equal sign. We will first try to remove the denominator by multiplying 'x' by (3+4y). This gives (3+4y)x = 1 - 2y.

We will then expand the brackets so we can get a sum of the single terms i.e this gives 3x + 4yx = 1 - 2y.

We will now gather all terms with 'y'  on the left hand side of the equal sign. This gives 4yx + 2y = 1 - 3x.

Now we factorise to get a single 'y' term, this gives (4x +2)y= 1 - 3x.

We finally try to get 'y' on its own by divinding both sides of the equal sign by (4x +2). This therefore gives us y = (1-3x)/ (4x +2) which is our final answer!

WI
Answered by Wajiha I. Maths tutor

16682 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

How do I graph linear inequalities?


There are 10 boys and 20 girls in a class. The class has a test. The mean mark for all the class is 60. The mean mark for the girls is 54. Work out the mean mark for the boys.


The perimeter of an isosceles triangle is 16cm. One of the sides equals to x+3, while the unequal one equals to x+4. Calculate the area of this triangle.


Jessica buys 10kg of chocolate for £20. She divides them into 500g bags which she sells for £1.30 each. Given that Jessica sells all her chocolate, what is her percentage profit?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences