Question

Solve the system by substitution.
-4.5x-2y= -12.5
3.25x-y= -0.75

Answer 1

multiply the bottom equation by -2 and then add the two equations

Answer 2

So -2(3.25x-y= -0.75)

Answer 3

?

Answer 4

now multiply that out

Answer 5

Okay give me a minute.

Answer 6

I can't do it on my calculator because i cant put in the = sign.

Answer 7

-6.5-2y=1.5

Answer 8

forget the calculator. use a pen and paper

Answer 9

Did i get it right?

Answer 10

its +2y

Answer 11

Oh your right. Two negatives make a positive.

Answer 12

So now what do i do?

Answer 13

Now add the two equations term by term and put your answer under the dotted line

-4.5x - 2y = -12.5
-6.5x + 2y = 1.5
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Answer 14

So i would add -4.5x and -6.5x.

Answer 15

yes and then the rest

Answer 16

-11

Answer 17

-2y+2y=0

Answer 18

you need to write that as one new equation underneath the dotted line term by term

Answer 19

-12.5+1.5=-11

Answer 20

-4.5x - 2y = -12.5
-6.5x + 2y = 1.5
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-11 + 0 = -11

Answer 21

first term is -11x

Answer 22

if you need more help ask @xMissAlyCatx

Answer 23

so we get a new equation of -11x=-11

Answer 24

Okay

Answer 25

go away gravyboat

Answer 26

now we divide both sides by -11 and we have a value for x

Answer 27

I'll let you do that

Answer 28

1x?

Answer 29

No, try again

Answer 30

Gotta go out for dinner so I'll get back to you in a couple of hors

Answer 31

Oh okay thanks.