Question

-x-3y=-11
y=8x-13
Solve by substitution

Answer 1

@nincompoop @Nnesha

Answer 2

wow this is tricky but i think i can figure it out

Answer 3

Yes I tricking me

Answer 4

well 2nd equation is already solved for y
so substitute y for 2nd equation into -x-3y=-11

Answer 5

ohhhh so we just solve for the fist equation? so we get

3y=x-11

Answer 6

for substitution you need to solve one of the equation for x `or` y
but 2nd equation is already solved for y then just plug that into the first equation

Answer 7

so just plug the 2nd and put for x above or?

Answer 8

y=8x -13 so you can replace y with 8x-13 \[\huge\rm -x-3\color{ReD}{y}=-11\]

Answer 9

y=8x-13 so replace y not x

Answer 10

ohoho so we get

-x-3(8x-13)=-11
-x-24x+39=-11
-25x+39=-11
-25x=-50
x=2

Answer 11

then now we plug it into
y=8x-13
y=8(2)-13
y=3

Answer 12

perfect!

Answer 13

wow that was easy I just got lost because it came with an extra number :D

Answer 14

wait a sec hmm

Answer 15

I got it correct no need :D

Answer 16

lol i was just checking

Answer 17

good job! :D