Question

Solve the system by using the substitution method
2x-3y=3
-2x+y=-4

Answer 1

It would be easiest to just add the two equations which will get rid of the x. Then you can solve for y

Answer 2

Inopeki should help you with this one.

Answer 3

If you must use substitution, it would be easiest to solve the second equation for y

Answer 4

what would y be?

Answer 5

What did you get when you added 2x to both sides?

Answer 6

get one variable by itself in one of the equations, then sub into the other equation
(1) 2x-3y=3
(2) -2x+y=-4
from (2) y=-4+2x
sub in (1) 2x-3(-4+2x)=3
solve for x, then plug in what you got for x into one of the original equations and solve for y
does that make sense?

Answer 7

yes! thank you!

Answer 8

your welcome!

Answer 9

do you know how to solve for x?

Answer 10

i didnt get the answer..i got x=-9/-4

Answer 11

did the question ask for what x is or y is?

Answer 12

both

Answer 13

idk how to get em

Answer 14

oh okay, does your question sheet have the answers on it?

Answer 15

no

Answer 16

okay so you have x=-9/-4, the negatives cancel out so you have x=9/4
now sub 9/4 into one of the original equations
for example: use equation 2
-2x+y=-4
-2(9/4)+y=-4
-9/2+y=-4
y=-4+9/2
y=17/2

Answer 17

thanks

Answer 18

does that make sense? do you understand how i got that answer?