Question

solve using substitution 9x+9y=-27 -5x+y=39

Answer 1

then use substitution.. those are just simple equations..

Answer 2

divide first equation by 3 to start - it will make things easier

Answer 3

i would change the 2nd equation to y=5x+39

Answer 4

i mean 9 !!!!

Answer 5

x+y=-3

Answer 6

right jimmy?

Answer 7

it then becomes x + y = -3

Answer 8

yep

Answer 9

y=-3-x
sub in other one
-5x-(-3-x)=39
-5x+3+x=39
-4x=36
x=-9

Answer 10

now plug into x=-9 into y=-3-x

Answer 11

you get y=6

Answer 12

thanks :)