If an equation of a line is y=2x+4 and it crosses the x axis at point R, what is the value of x?

Since we know that the line crosses the x axis, we can assume that the value of Y at this point is 0. So we must substitute y = 0 into the equation y = 2x + 40 = 2x + 4we now have to isolate x on its own so we -4 from both sides of the equations as we want to get rid of it on the right hand side -4 = 2x and now we have to divide both sides by 2 in order to get x on its own -2 = x so the value of x at point R is -2

Answered by Abigail C. Maths tutor

2825 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

The sides of a rectangle are x and (x+2), where x>0 the area of the rectangle is 8, what is the value of x?


How do I draw a pie diagram?


(i) Find the gradient of the straight line passing through the points: (0,3) and (9,21). (ii) Write down the equation of the line in form y = mx + c


The probability of pulling out a coloured counter from a bag is shown below: Green=0.2. Purple=0.15. Black=0.3. Pink=?. What is the probability of pulling out a pink counter?


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