Question

solve the following linear equation by using graphical method
A) x-2y=0 ,3x+4y=20​

Answer 1

Answer:

x=5 and y=5/2

Step-by-step explanation:

x-2y=0,3x+4y=20

Given:-x-2y=0

3x+4y

x-2y=0...............(I)

3x+42=20.........(II)

Multiplying Equation(i)by 2 we get

2x-2y=0.............(III)

Solving equations (II) and (III) we get

3x+4y=20

2x-4y=0

___________

5x=20

x=5

Substituting the value of x in equation (I) we get

5-2y=0

-2y=-5

2y=5

y=5/2

Hence x=5 and y=5/2

Answer 2

Step-by-step explanation:

3x + 4y + 5 = 0; x – y= -4

3x + 4y + 5 = 0; x – y= -4

solve the following linear equation by using graphical method

A) x-2y=0 ,3x+4y=20