Question

Does someone mind helping me with this problem? Thank you!

Answer 1

You just have to plug in one equation into the other, though you might already know this but the answer would be,

(-1,2)

Answer 2

The first step in solving this system of equations by elimination method is to eliminate one of the variables by adding or subtracting the two equations.

-9x - 4y = 1

3x + 3y = 3

If we multiply the first equation by 3 and the second equation by -9, we get:

-27x - 12y = 3

-27x - 27y = -27

Now we can add these two equations:

-12y = -24

y = 2

Now we can substitute this value of y back into one of the original equations to find the value of x.

-9x - 4(2) = 1

-9x - 8 = 1

-9x = 9

x = -1

So the solution of this system of equations is (x,y) = (-1,2)