How do you find the x and y intercept of 5x-y=355xy=35?

1 Answer
Jan 18, 2017

See the entire process below:

Explanation:

To find the x-intercept substitute color(red)(0)0 for color(red)(y)y and solve for xx:

5x - color(red)(y) = 355xy=35 becomes:

5x - color(red)(0) = 355x0=35

5x = 355x=35

(5x)/color(red)(5) = 35/color(red)(5)5x5=355

(color(red)(cancel(color(black)(5)))x)/cancel(color(red)(5)) = 7

x = 7

To find the y-intercept substitute color(red)(0) for color(red)(x) and solve for y:

5color(red)(x) - y = 35 becomes:

(5 xx color(red)(0)) - y = 35

0 - y = 35

-y = 35

color(red)(-1) xx - y = color(red)(-1) xx 35

y = -35

The x-intercept is 7 or (7, 0)

The y-intercept is -35 or (0, -35)