Finding x and y intercepts of each equation: the equation is x+y=3

X intercept is where the line crosses the x axis or where y=0

y intercept is where the line crosses the y axis or where x=0

x+y=3

x intercept

set y to 0

x+0=3

x=3

the x intercept is at x=3

y intercept

set x to 0

0+y=3

y=3

the x intercept is at y=3