20x + 8y = 240
x-intercept, y = 0;
20x + 8(0) = 240
20x = 240
x = 240/20
x = 12
y-intercept, x = 0;
20(0) + 8y = 240
8y =240
y =240/8
y = 30
.................................................
15x + 3y = 270
x-intercept, y = 0;
15x + 3(0) = 270
15x = 270
x = 270/15
x = 18
y-intercept, x = 0;
15(0) + 3y = 270
3y = 270
y = 270/3
y = 90
....................................
y = 8x + 168
x-intercept, y = 0;
0 = 8x + 168
8x = -168
x = -168/8
x = -21
y-intercept, x = 0;
y = 8(0) + 168
y = 168