Question

x-2y=0
3x+4y=2
solve by graphical method

​

Answer 1

Answer:

x=0.4           y=0.2

Step-by-step explanation:

this is a simultaneous equation so here are the steps

step 1: make x the subject in x-2y=0

its going to be x=2y

step 2: substitute x in 3x+4y=2

its going to be 3(2y)+4y=2

step 3: simplify 3(2y)+4y=2

so is going to be 3*2y is 6y +4y is 10y

so 10y=2

therefor y= 0.2

step 4: substitute y in x-2y=0 to find x

its going to be x-2(0.2)=0

so x-0.4=0         x must be= to 0.4 because 0.4-0.4 is 0

so x=0.4 y=0.2

you can check your answer by substituting your answer in the other equation eg. 3(0.4)+4(0.2)=2    because x=0.4 and y=0.2

if you get 2 in that substitution then your answer is correct

so the answer to the question is x=0.4 and y=0.2