Question

Solve the system of equations

5x-y=3 and -10x+2y=-6

Answers:
A; 0.-3
B: -3.0
C: 3,12
D: no solution
E: infinitely many solutions

Answer 1

isolate y in the first equation

Answer 2

can you do that?

Answer 3

I don't think so... Am I rewriting the first equation?

Answer 4

ya you want y by itself

Answer 5

first add y to both sides

Answer 6

5x=3+y

Answer 7

then subtract 3 from both sides

Answer 8

y=5x-3

Answer 9

now plug in (5x-3) for y in the second equation

Answer 10

-10x+2(5x-3)=-6

Answer 11

now try and solve for x

Answer 12

-10x+4=-6?

Answer 13

no, foil out 2(5x-3)

Answer 14

Wouldn't I have to do 2 times 5 then 2 times 3

Answer 15

2 times 5 plus 2 times -3

Answer 16

*2 times 5x

Answer 17

2 times 5x= 10x
2 times =3= -6

Answer 18

thats right, so we have
-10x + 10x - 6 = -6

Answer 19

simplify that

Answer 20

Simplify? Like break it down again

Answer 21

you want to get x by itself to solve it

Answer 22

Do you minus one of them on both sides

Answer 23

lets just look at the x's.
what is -10x + 10x?

Answer 24

0..

Answer 25

that's right

Answer 26

Yayy

Answer 27

so what should be your answer?

Answer 28

0,-3?

Answer 29

no, how did you get -3?
anyways, since the x's cancel out there can't be a solution to this system of eqaution

Answer 30

Ah okay >< sorry, thanks for your help!

Answer 31

no problem