Question

System of Equations



3X-Y= -8
2X+ 5Y=-45

Simplify to get
Y=?
X=?

Answer 1

Hello and Welcome to OpenStudy! :)

would you like to solve this using the elimination method or the substitution method?

Answer 2

hey :)
which ever method is easier, what do you think?

Answer 3

how about substitution?

Answer 4

sure :)

3X-Y= -8 isolate the y -> y = 3x + 8 <- then plug in to the one below
2X+ 5Y=-45
so 2x + 5(3x + 8) = -45 distribute
2x + 15x + 40 = -45
solve for x

Answer 5

x=5?

Answer 6

close :)
there should be a negative I think

Answer 7

ohh yeah i made a small mistake.. opps
so x=-5

Answer 8

whats next?

Answer 9

yep :)
then plug it into one of the original equations
so plug in x= -5 into y = 3x + 8
and solve for y

Answer 10

y=-7?

Answer 11

correct! :)

Answer 12

you're welcome :)

Answer 13

you too :) glad I could help :)