Question

What is the solution to the system of equations?
2x+y=-3
x-2y=-4

( , )

Answer 1

@perl

Answer 2

x = 2y -4

Answer 3

All right so there are two methods. Substitution and combining. In this case, substitution would be easier

Answer 4

its not the answer

Answer 5

okay

Answer 6

you have to plug in x into the y equation

Answer 7

which is y = 2x +3

Answer 8

so, y = 2(2y-4) + 3

Answer 9

Okay

Answer 10

and for the x equation you plug in what you got for y

Answer 11

and you get your two points

Answer 12

i got 3, 4 ???

Answer 13

@perl

Answer 14

let me check with wolfram

Answer 15

http://www.wolframalpha.com/input/?i=solve+2x%2By%3D-3%2C+x-2y%3D-4

Answer 16

for x...
x = 2(-2x-3)-4
x = -4x -10
5x = -10
x = -10/5
x = -2

Answer 17

just do the same for the other one and you should get 1

Answer 18

2(2) + y = -3
4 + y = -3
y = 1