Question

graph x+y =7 3x_y=1 for this graph​

Answer 1

Step-by-step explanation:

Step by Step Solution

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System of Linear Equations entered :

[1] x + y = 7

[2] 3x - y = 1

Graphic Representation of the Equations :

y + x = 7 y + 3x = 1

Solve by Substitution :

// Solve equation [1] for the variable y

[1] y = -x + 7

// Plug this in for variable y in equation [2]

[2] 3x - (-x +7) = 1

[2] 4x = 8

// Solve equation [2] for the variable x

[2] 4x = 8

[2] x = 2

// By now we know this much :

x = 2

y = -x+7

// Use the x value to solve for y

y = -(2)+7 = 5

Solution :

{x,y} = {2,5}

Answer 2

Step-by-step explanation:

// Solve equation [1] for the variable y

[1] y = -x + 7

// Plug this in for variable y in equation [2]

[2] 3x - (-x +7) = 1

[2] 4x = 8

// Solve equation [2] for the variable x

[2] 4x = 8

[2] x = 2

// By now we know this much :

x = 2

y = -x+7

// Use the x value to solve for y

y = -(2)+7 = 5

solution :

{x,y} = {2,5}

Hope it will help you