That depends on the value of y.
y is a sum of constants and so is itself a constant. Its derivative is, therefore, zero.
3y plus 7 makes a tomato pie and 1-y is .....em.......oh look at that it is past my bedtime! Cheerio!
4y
a = 3 and y = 0
x = y = 0 ?
-17 + y,,must be equals to..-17y..
2
y=-10x-4
x = 14
x = -4 and y = 2
x=.293 y=11.328
(1, 9)