Question

is the equation -2(4-x)=2x-8 an identity

Answer 1

what do you get when you distribute -2(4-x)

Answer 2

i dont know :(

Answer 3

hint:

a*(b+c) = a*b + a*c

Answer 4

that's the distributive property in general

Answer 5

can you draw it

Answer 6

-8 - 2x thats what i got

Answer 7

-2 times (-x) = +2x or just 2x

Answer 8

so you should have

-8 + 2x

Answer 9

that means

-2(4-x)=2x-8

turns into

-8 + 2x = 2x - 8

Answer 10

ok how u get the positive sign

Answer 11

the negative on the -2

and the negative on the -x

they multiply to a positive

Answer 12

(negative) times (negative) = positive

Answer 13

ok but now what to do

Answer 14

well since we can add two numbers in any order this means that

-8 + 2x

is really the same as

2x + (-8)

but that turns into

2x - 8

Answer 15

so

-8 + 2x = 2x - 8

turns into

2x - 8

Answer 16

how

Answer 17

I just showed how

Answer 18

you swap the terms in -8 + 2x to get 2x - 8

Answer 19

ok thanks

Answer 20

hopefully it's making sense?

Answer 21

yes

Answer 22

alright, that's great

Answer 23

is 2x=3=7x a odentity or have no solution

Answer 24

identity*

Answer 25

there are too many equal signs

Answer 26

2x + 3 =7x

Answer 27

try to isolate x and tell me what you get

Answer 28

3 = 5x

Answer 29

keep going

Answer 30

i dont know the rest

Answer 31

you have

5x = 3

but you want something like

x = ....

Answer 32

please tell me i dont know

Answer 33

5x means 5 times x

Answer 34

what undoes multiplication?

Answer 35

i dont know

Answer 36

what operation is the opposite of multiplication?

Answer 37

may you please understand i dont know understand none of this

Answer 38

well something like subtraction is the opposite of addition

so ________ is the opposite of multiplication

Answer 39

divide

Answer 40

good, so you divide both sides by 5


5x = 3

5x/5 = 3/5

x = 3/5

Answer 41

so the solution to 2x + 3 =7x is x = 3/5

this is the only solution

Answer 42

5(y-2) = -2(12-9y) +y