Question

Solving the equation X+y=8 and 2x-y =7, we get

Answer 1

System of Linear Equations entered :

[1] x + y = 8

[2] 2x - y = 7

Graphic Representation of the Equations :

y + x = 8 y + 2x = 7

Solve by Substitution :

// Solve equation [1] for the variable y

[1] y = -x + 8

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

[2] 2x - (-x +8) = 7

[2] 3x = 15

// Solve equation [2] for the variable x

[2] 3x = 15

[2] x = 5

// By now we know this much :

x = 5

y = -x+8

// Use the x value to solve for y

y = -(5)+8 = 3

Solution :

{x,y} = {5,3}

I hope you are understand my solution

Answer 2

Answer:

x=5

Step-by-step explanation:

x+y=8  ___(1)

2x-y=7 ___-(2)

by elimination method,

(1)+(2),

3x=15

x=5