Question

Solve graphically : x+y=5 and 2x-y =7​

Answer 1

Answer:

given that

the answer

is 3+2

Answer 2

Answer:

Solve equation [1] for the variable y

[1] y = -x + 5

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

[2] 2x - (-x +5) = 7

[2] 3x = 12

// Solve equation [2] for the variable x

[2] 3x = 12

[2] x = 4

// By now we know this much :

x = 4

y = -x+5

// Use the x value to solve for y

y = -(4)+5 = 1

Solution :

{x,y} = {4,1}