X-intercept of the line whose equation is 8x+2y=4

To find the x intercept, you need to set the equation equal to y.

2y=-8x+4

y=-4x+2

Then, you need to set y as zero and solve for x, since you are trying to find the x value when y is 0 (x-intercept).

0=-4x+2

-2=-4x

2=4x

x=1/2

The x-intercept is (1/2, 0).