Find the x- and y- coordinates of the point of intersection of the lines x + 3 y = − 1 − 3 x + y = − 1

Question

Find the x- and y- coordinates of the point of intersection of the lines

 x + 3 y = − 1

− 3 x + y = − 1

Answer 1

I will not solve this simultaneous set for you, but I will tell you how to do it.

From the second equation get y = 3x-1

Substitute this into the first equation to get the value of x.

The use the value of x and the first equation to get y.

Hint: xand y have fractional values with denominator 5.