Work out the values of x and y using the equations 2x + 3y = 18 and x + y = 6

First, we need to identify what type of question this is. Since there are two equations with two unknown values, we can conclude this is a simultaneous equation problem. The fastest way to solve the question is by eliminating one of the unknown values: x or y, then after we find out what x or y is, we can then use this information to find what the other unknown value is. First step: We need to label our equations so the subsequent steps will be easier to follow. 2x + 3y = 18 (1) x + y = 6 (2) Second step: using (2), we derive x=6-y (3) Third Step: We substitute (3) into (1), giving (6-y)*2 +3y=18 => 12-2y+3y =18 => 12+y=18 => y=6Fourth Step: using (3), x=6-6=0 Final Step: Final check by substituting the values we found into (1) and (2) to verify our answers.

Answered by Rebecca H. Maths tutor

3887 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Solve the simultaneous equations: 4x+5y = 38 , x-y = 5


How do I calculate the gradient of a non linear equation at a given point?


How do you solve a simultaneous equation?


A group of 35 students were asked if they owned a laptop or a TV. 10 said they had both. 12 said they had only a TV. 20 said they had atleast a laptop. A student is picked at random. What is the probability that the student has neither a laptop or a TV?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences