Question

Solve the system by substitution!

Answer 1

2.5x-3y=-13
3.25-y=-14

Answer 2

Do you mean 3,.25x?

Answer 3

Solve the last equation: y=17.25
Next, plug it in,
2.5x-51.75=-13
then add
2.5x=38.75
and simplify

5x=77.5
and
x=15.5

Answer 4

Thank you so much you have no idea

Answer 5

yes 3.25x

Answer 6

@zakiullah

Answer 7

In that case my answer is wrong...

Answer 8

Okay, can you guys show me this with steps

Answer 9

so i can understand

Answer 10

In that case, isolate for one variable. Say y. thensub that for y into the other equation.

Answer 11

can you show me how to do it? im really in need of some help here

Answer 12

3.5x-2y=-14
y=3.5x+14

Answer 13

Plug the y back in; you will get -3.5x=14 and so x=-4

Answer 14

is that all i have to do? Like z did up there ^

Answer 15

@hodori0719 really need your help here

Answer 16

@NotTim

Answer 17

They all really showed the most amount of steps I feel.

Answer 18

Yes but is that it? that all i have to do?

Answer 19

Yes.

Answer 20

3.5x-2y=-14
y=3.5x+14 ?

Answer 21

Solve the system, solve for X. Yup.

Answer 22

im confused so is that my answer?

Answer 23

which would i solve for x?

Answer 24

He already explained. Solving for the system, here, is solving for x.

Answer 25

Let me show you full steps

Answer 26

2.5x-3y=-13 equation 1
3.25x-y=-14 equation 2

Isolate for equation 1 or 2 and find any of the variables. So I'll just do equation 2 and isolate for y
3.25x-y=-14
3.25x+14=y

Now that we isolate for a variable we sub it into the other equation that we have...

2.5x-3(3.25x+14)=-13

Solve for x

2.5x-9.75x-42=-13
-7.25x=-13+42
-7.25x=29
x=-4

Now that we have the value for x we can just sub this value into the isolated version of y and find the value of y

3.25(-4)+14=y
y=1

Answer 27

Does this help?