Question

x+y=40x-y=20(x/y)+(x/y)=?​

Answer 1

Step-by-step explanation:

[1] x + y = 40

[2] x - y = 20

Graphic Representation of the Equations :

y + x = 40 y + x = 20

Solve by Substitution :

// Solve equation [2] for the variable x

[2] x = y + 20

// Plug this in for variable x in equation [1]

[1] (y +20) + y = 40

[1] 2y = 20

// Solve equation [1] for the variable y

[1] 2y = 20

[1] y = 10

// By now we know this much :

x = y+20

y = 10

// Use the y value to solve for x

x = (10)+20 = 30

Solution :

{x,y} = {30,10}