Question

Solve 3|2x+5|=12

Answer 1

Try dividing both sides by 3 to isolate the |2x+5|

Answer 2

Also if |u|=a where a is positive
then u=a or u=-a

Answer 3

ok so 2x+5 = 4

Answer 4

yes

Answer 5

that's one equaiton you will neeed to solve
there is one more equation you need to solve

Answer 6

subtract 5

Answer 7

from both side

Answer 8

what equation?

Answer 9

there is another equation you have to solve after you find x

Answer 10

the same equation just plug in the x

Answer 11

for now lets find x first

Answer 12

ok so x is -1/2 correct?

Answer 13

yes

Answer 14

now plug in -1/2 to the first equation

Answer 15

3|2x+5|=12
divide 3 on both sides
|2x+5|=4
the two equations you need to solve are:
2x+5=4 2x+5=-4

Answer 16

which is 3|2x+5|=12

Answer 17

now plug in -1/2 to x

Answer 18

@gudetamas you there

Answer 19

yes

Answer 20

ok i worked it out and i got x = 1

Answer 21

is that the final answer or do i put down the two answers?

Answer 22

no sorry post it and i will see where you messed up

Answer 23

ok so i did 3|2(-1/2)+5| = 12 and then 2(-1/2) is 1 so i wrote 3|-1+5|=12 and then i divided by 3 on both sides and got -1+5=4 and the i subtracted 5 and got -1

Answer 24

have you solve the two equations I wrote above @gudetamas ?

Answer 25

1) 2x=-1 and 2) 2x +5 = -9

Answer 26

where did the -9 come from?

Answer 27

the equations I wrote were
"3|2x+5|=12
divide 3 on both sides
|2x+5|=4
the two equations you need to solve are:
2x+5=4 2x+5=-4"

Answer 28

-4 - 5

Answer 29

the first one you can rewrite as 2x=-1
and the second oen can be rewritten as 2x=-9

Answer 30

not 2x+5=-9

Answer 31

oh yeah sorry

Answer 32

and then i do what?

Answer 33

you still need to finish solving 2x=-1 and 2x=-9
I think you solve the first and got x=-1/2

Answer 34

yes

Answer 35

how would i finish solving

Answer 36

are you having trouble solving 2x=-9?

Answer 37

to undo multiplication you will need to divide to isolate the variable

Answer 38

u divide 2 by -9

Answer 39

the other way around
-9 by 2

Answer 40

it would be -9/2

Answer 41

yes -9/2

Answer 42

-9/2 says divide -9 by 2

Answer 43

but anyways -9/2 is the other solution

Answer 44

thankk you