Question

solve the simultaneous equation graphically X + 2y is equal to 5 Y is equal to minus 2 x minus 2​

Answer 1

Answer:

$x = - 3 \\ y = 4$

Step-by-step explanation:

To solve these equations graphically

$x + 2y = 5 \\ y = - 2x - 2$

Firstly solve these two individually,by putting the value of x and calculate the value of y.

1) x+2y = 5

put y=0,then x=5 =>(5,0)

put x=0,then y=2.5 =>(0,2.5)

2)y=-2x-2

put y=0,then x=-1 =>(-1,0)

put x=0,then y=-2 =>(0,-2)

On sketching these points ,both lines meet at (-3,4)

So, the solution of these equations are

x=-3

y=4

Hope it helps you.

Answer 2

Answer:

x+2y = 5

x+2y = 5put y=0,then x=5 =>(5,0)

x+2y = 5put y=0,then x=5 =>(5,0)put x=0,then y=2.5 =>(0,2.5)

x+2y = 5put y=0,then x=5 =>(5,0)put x=0,then y=2.5 =>(0,2.5)2)y=-2x-2

x+2y = 5put y=0,then x=5 =>(5,0)put x=0,then y=2.5 =>(0,2.5)2)y=-2x-2put y=0,then x=-1 =>(-1,0)

x+2y = 5put y=0,then x=5 =>(5,0)put x=0,then y=2.5 =>(0,2.5)2)y=-2x-2put y=0,then x=-1 =>(-1,0)put x=0,then y=-2 =>(0,-2)

x+2y = 5put y=0,then x=5 =>(5,0)put x=0,then y=2.5 =>(0,2.5)2)y=-2x-2put y=0,then x=-1 =>(-1,0)put x=0,then y=-2 =>(0,-2)On sketching these points ,both lines meet at (-3,4)

x+2y = 5put y=0,then x=5 =>(5,0)put x=0,then y=2.5 =>(0,2.5)2)y=-2x-2put y=0,then x=-1 =>(-1,0)put x=0,then y=-2 =>(0,-2)On sketching these points ,both lines meet at (-3,4)So, the solution of these equations are

x+2y = 5put y=0,then x=5 =>(5,0)put x=0,then y=2.5 =>(0,2.5)2)y=-2x-2put y=0,then x=-1 =>(-1,0)put x=0,then y=-2 =>(0,-2)On sketching these points ,both lines meet at (-3,4)So, the solution of these equations arex=-3

x+2y = 5put y=0,then x=5 =>(5,0)put x=0,then y=2.5 =>(0,2.5)2)y=-2x-2put y=0,then x=-1 =>(-1,0)put x=0,then y=-2 =>(0,-2)On sketching these points ,both lines meet at (-3,4)So, the solution of these equations arex=-3y=4

x+2y = 5put y=0,then x=5 =>(5,0)put x=0,then y=2.5 =>(0,2.5)2)y=-2x-2put y=0,then x=-1 =>(-1,0)put x=0,then y=-2 =>(0,-2)On sketching these points ,both lines meet at (-3,4)So, the solution of these equations arex=-3y=4Hope it helps you.