Question

What is the solution to the equation?
-8x + 9x - 21 = -12 - 16
{ }

Answer 1

-12 - 16 = -28
-8 + 9 - 21 = -20
X = ?

Answer 2

not -2 that would = 23

Answer 3

-8 is also a no

Answer 4

@Nnesha

Answer 5

\(\color{blue}{\text{Originally Posted by}}\) @Demonx341
-12 - 16 = -28
-8 + 9 - 21 = -20
X = ?
\(\color{blue}{\text{End of Quote}}\)
you can't `can't` combine -9and -8 with -21

Answer 6

? its -8 + 9 - 21

Answer 7

they are not like terms
you can't combine variable term with just number

Answer 8

oh XD

Answer 9

it's -8x+9x-21 combine like terms
here is an example
2x+2x +5= 4x+5 i can't combine 4x with 5

Answer 10

Let's solve your equation step-by-step.
−8x+9x−21=−12−16
Step 1: Simplify both sides of the equation.
−8x+9x−21=−12−16
Simplify: (Show steps)
x−21=−28
Step 2: Add 21 to both sides.
x−21+21=−28+21
x=−7
Answer:
x=−7

Answer 11

-8x + 9x = 1x

Answer 12

let him do it.

Answer 13

btw i have to find out what x = XD

Answer 14

It would Be -7 Tho :P

Answer 15

yes right x -21=-28
right now move the 21 to the right side

Answer 16

Yes... In my equation... x = -7

Answer 17

ok XD

Answer 18

Great Work!

Answer 19

-28 - 21 = -49

Answer 20

nope how would you cancel out -21 from left side
would you add ,subtract ,divide or multiply ?

Answer 21

add

Answer 22

-28 + 21= -7

Answer 23

looks good!

Answer 24

1*-7 = -7 xD

Answer 25

now you can check ur answer
substitute x for -7 \[\huge\rm -8(-7)+9(-7)-21=-12-16\] both sides are equal good to go!

Answer 26

:P both = -28

Answer 27

yes right that means x=-7 is correct
good work!

Answer 28

Demon you need to fan me in order for me to send messages back

Answer 29

XD forgot about that

Answer 30

Sorry. Please continue