Question

y=-4x
y=x-15

Answer 1

set the first y equal to the second y:
-4x=x-15
solve from there:
-5x=-15
-x=-3
x=3

Answer 2

do i do this -5(3)

Answer 3

what do you mean?

Answer 4

you are trying to solve for x, right?

Answer 5

i thought i had x alredy

Answer 6

isnt x=3

Answer 7

ohhhh you mean to solve for y? yes, sorry. plug 3 in for x, so youll have:
y=-4x -> y=-4(3) -> y=-12
or
y=x-15 -> y=3-15 -> y=-12

Answer 8

thx

Answer 9

np!