anonymous
  • anonymous
What is the solution to the equation? -8x + 9x - 21 = -12 - 16 { }
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
-12 - 16 = -28 -8 + 9 - 21 = -20 X = ?
anonymous
  • anonymous
not -2 that would = 23
anonymous
  • anonymous
-8 is also a no

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anonymous
  • anonymous
@Nnesha
Nnesha
  • Nnesha
\(\color{blue}{\text{Originally Posted by}}\) @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
anonymous
  • anonymous
? its -8 + 9 - 21
Nnesha
  • Nnesha
they are not like terms you can't combine variable term with just number
anonymous
  • anonymous
oh XD
Nnesha
  • Nnesha
it's -8x+9x-21 combine like terms here is an example 2x+2x +5= 4x+5 i can't combine 4x with 5
ryanwhite499
  • ryanwhite499
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
anonymous
  • anonymous
-8x + 9x = 1x
Nnesha
  • Nnesha
let him do it.
anonymous
  • anonymous
btw i have to find out what x = XD
anonymous
  • anonymous
It would Be -7 Tho :P
Nnesha
  • Nnesha
yes right x -21=-28 right now move the 21 to the right side
ryanwhite499
  • ryanwhite499
Yes... In my equation... x = -7
anonymous
  • anonymous
ok XD
ryanwhite499
  • ryanwhite499
Great Work!
anonymous
  • anonymous
-28 - 21 = -49
Nnesha
  • Nnesha
nope how would you cancel out -21 from left side would you add ,subtract ,divide or multiply ?
anonymous
  • anonymous
add
anonymous
  • anonymous
-28 + 21= -7
Nnesha
  • Nnesha
looks good!
anonymous
  • anonymous
1*-7 = -7 xD
Nnesha
  • Nnesha
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!
anonymous
  • anonymous
:P both = -28
Nnesha
  • Nnesha
yes right that means x=-7 is correct good work!
ryanwhite499
  • ryanwhite499
Demon you need to fan me in order for me to send messages back
anonymous
  • anonymous
XD forgot about that
ryanwhite499
  • ryanwhite499
Sorry. Please continue

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