Mathswatch

(edited 5 years ago)

I’ve got a question saying: make t the subject of the formula t=r/r-3

Any help? :smile:

But t is already the subject of the formula since it's by itself on the left side

Original post by 3pointonefour

But t is already the subject of the formula since it's by itself on the left side

I changed it thanks, I didn’t realise

1. Multiply (r-3)(t)=tr-3t=r
then bring r to the right hand side and take 3t to the other side
tr-r=3t
factorise the r
r(t-1)=3t
r= 3t/t-1

I’ve got a question saying: make r the subject of the formula t=r/r-3

Any help? :smile:

Multiply both sides by r - 3, isolate both r terms on one side, then factorise, and divide to make r the subject.

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