Question

Solve each equation
16. 3x-12=2x
17. -7x+7=3x-23
18. 0.6x-1.8=1.2x

Answer 1

for 16. write -2x on each side (add -2x to both sides)
then simplify

Answer 2

okay then divide

Answer 3

-12?

Answer 4

3x-2x-12=2x-2x

Answer 5

you should get in the habit of writing the entire equation. Less chance of making a mistake

Answer 6

i did on paper just not on here

Answer 7

3x-2x-12=2x-2x

3x-2x is 1x (3 x's take away 2 x's leaves 1 x)
and of course 2x-2x is 0
so
x -12 =0

now what do you do?

Answer 8

can it be 1x-12=0? expect for x-12=0?

Answer 9

1x is the same as x. (math people don't bother writing 1 )
anyway
x-12= 0
what do you do next to find x?

Answer 10

+12 on both sides

Answer 11

yes

Answer 12

x=12

Answer 13

17. -7x+7=3x-23

you could add +7x to both sides and add +23 to both sides

or, add -3x to both sides and -7 to both sides.

Answer 14

to both sides of what?

Answer 15

when solving an equation you do the same thing to both sides (to be fair)
both sides means both sides of the = sign

Answer 16

im doing the problem right now

Answer 17

x=3

Answer 18

17. -7x+7=3x-23
add +7x to both sides. write +7x on each side
7x-7x+7= 3x+7x-23
7x-7x on the left is 0
3x+7x on the right is 10x
so
7= 10x-23

add 23 to both sides
23+7= 10x-23+23
30= 10x

now what do you do?

Answer 19

got the answer already 3.

Answer 20

yes.
10x= 30 (changed from 30=10x from habit)
divide by 10 on both sides
x= 30/10
x=3

Answer 21

okay #18

Answer 22

18. 0.6x-1.8=1.2x

what would you do first?

Answer 23

+0.6 on both sides

Answer 24

try -0.6x

Answer 25

or subtract

Answer 26

okay doing the problem noww

Answer 27

is it -1.8/0.6

Answer 28

x=-3

Answer 29

x= -1.8/0.6

yes
to make it (look) easy, multiply top and bottom by 10
\[ x= -\frac{1.8}{0.6}\cdot \frac{10}{10} \]
(10 over 10 is one, so this does not change the value)

Answer 30

how'd you'd get 10?

Answer 31

10 times 0.6 = 6 (no decimal)
10 * 1.8= 18
so the problem becomes
- 18/6 which is easy you get -3

Answer 32

OH WELL i did it a diffrent way and still got -3

Answer 33

how did you do it ?

Answer 34

after i subtracted 0.6 on both sides. i got 0.6... i brought down the -1.8 and divide it by 0.6 i got -3 for x

Answer 35

how did you divide it? with a calculator ?

Answer 36

yeah.

Answer 37

if you want to do it without a calculator, you use the trick I showed you.
(assuming you know that 3*6=18!)

Answer 38

ohhh thats pretty easy

Answer 39

You are smarter than the average bear.

Answer 40

lol thanks for the help