Question

Need help with 15 8th grade questions. Will medal and fan!

Answer 1

ill do my best to help you out :D

Answer 2

What is the solution to the equation?

Answer 3

-18+4+x=9-19

x=

Answer 4

so keep x on one side and move all the the other number to the other... you should end up with x=9-19+18-4, add them all up and there you have it :D

Answer 5

So, 4?

Answer 6

@Emeyluv99

Answer 7

4x-26-3x=16-20

x=

Answer 8

thats right

Answer 9

now for this second one, keep all the x's on one side and move everything else to the other

Answer 10

4-26-3=16-20? @emeyluv99

Answer 11

hang on, where are your x's you should be getting 4x-3x= 16-20+26

Answer 12

I don't know. I'm confused :x I don't understand this.

Answer 13

ok so you want to figure out the value of x. Yes?

Answer 14

Correctumundo.

Answer 15

so you have two numbers that are multiples of x, but, because you dont know what x is, you dont know what 4x or 3x is.

Answer 16

Yes.

Answer 17

so now, what we can do is put all the numbers that we know the value of (ie all the number that are not multiples of x) on one side, and keep the multiples of x on the other

Answer 18

this just helps us see what we do and dont know and makes it easier to solve.

Answer 19

go ahead and try it.

Answer 20

So, 4x-3x= 16-20+26

Answer 21

@Emeyluv99

Answer 22

good.

Answer 23

I just copied what you put earlier....xd

Answer 24

so now, what do you think 4x-3x is

Answer 25

(ahah cheeky)

Answer 26

I don't know!~ I am SO confused. No matter how it gets explained I don't understand.

Answer 27

ok lets try some experimenting then shall we?

Answer 28

We shall.

Answer 29

so lets pretend that x=5.

Answer 30

whats 3*5-4*5

Answer 31

5

Answer 32

NO!

Answer 33

-5

Answer 34

yes, youre correct

Answer 35

its - 5

Answer 36

15-20= -5

Answer 37

now try with x=20. whats 4*20-3*20

Answer 38

20

Answer 39

good

Answer 40

how about when x=30? whats 4*30-3*30?

Answer 41

120-90=30

Answer 42

I get this part.

Answer 43

ae you seeing a pattern here?

Answer 44

Yes.

Answer 45

so theres this rule in algebra. It goes somehting like this:

ax+bx =(a+b)x

Answer 46

here a can be any number and b can be any number. id either of them are negative, that meass youre subtracting.

Answer 47

in your case, a is 4 and b is -3. see if you can work out what 4x-3x is with this rule