y=2x+5, calculate x when y=11

So what we need to do is work out what x is when y is equal to 11.Firstly, we would rearrange the equation so that x is the subject and to do this we subtract 5 from both sides.Thisgives us y-5 =2x. Dividing both sides by 2 will give us x=(y-5)/2.Now we know in this case y is equal to 11 and when we substitute this into the equation we get x = (11-5)/2 = 6/2 = 3.Therefore when y=11, x=3

DA
Answered by Daniaal A. Maths tutor

3579 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

James is 7 years older than Kate. Sam is twice as old as James. The sum of their ages is 77. Find the ratio of Kate's age to James' age to Sam's age.


How do you simplify the square root of 18 without using a calculator?


A) Raf, Jasmin and Carlos swim lengths of the pool for charity. Raf swims 30 more lengths than Jasmin. Jasmin swims four times as many lengths as Carlos. Altogether they swim 372 lengths. How many lengths each person swim?


Simplify : 3a(b^2) * (a^3)b


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