Question

Given the system of equations, what is the solution?

x + 2y = 11
x - 2y = -1


{(-5, -3)}
{(1, 1)}
{(5, 3)}

Answer 1

We can use elminiation.

-1(x + 2y = 11)
x - 2y = -1

-x-2y=-11
x-2y=-1

-4y=-12
y=3

Then you plug that back into one of the original equations and solve for x.

Answer 2

Hello?

Answer 3

x + 2y = 11
x - 2y = -1
------------ assum the same terms
2x 0 = 10

2x=10

x=10/2 = 5

x=5

5-2y=-1
5+1=2y
6=2y

y=6/2

y= 3

x=5
y=3