anonymous
  • anonymous
Solve for x: −3|x + 7| = −12 x = 5 over 3, x = −19 over 3 x = −3, x = −11 x = −3, x = 11 No solution
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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calculusxy
  • calculusxy
I see that you are posting these types of questions. Do you know how to solve them?
anonymous
  • anonymous
no
calculusxy
  • calculusxy
One of my good ways would be to actually plug in the numbers

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More answers

anonymous
  • anonymous
how do i do that ?
calculusxy
  • calculusxy
I will teach that to you. Do you know what the absolute value symbols mean?
anonymous
  • anonymous
that whats inside it is positive ?
calculusxy
  • calculusxy
Yes or, in other words, the distance from that number and 0 (that's why it's positive).
calculusxy
  • calculusxy
So what will happen to the negative numbers once you plug them inside of the absolute value?
anonymous
  • anonymous
they will become positive
calculusxy
  • calculusxy
Good.
calculusxy
  • calculusxy
Now let's work with the first option.
anonymous
  • anonymous
okay
calculusxy
  • calculusxy
Actually for the sake of time, let's do the second one.
anonymous
  • anonymous
haha alright
calculusxy
  • calculusxy
If we first plug in -3 for x. \[-3|-3+7|\] First, we need to work with the numbers inside of the parenthesis. what is -3 + 7?
calculusxy
  • calculusxy
sorry not the parenthesis, i meant the absolute value symbols.
calculusxy
  • calculusxy
in other words, what is the absolute value of -3 + 7?
calculusxy
  • calculusxy
did you get the answer?
anonymous
  • anonymous
how would i get the absolute value of that?
welshfella
  • welshfella
x: −3|x + 7| = −12 divide both sides by -3 |x + 7| = 4 now the left side is positive but the x + 7 can be negative or positive so we have x + 7 = 4 or x + 7 = -4 solve these 2 equations
calculusxy
  • calculusxy
-3 + 7 = 4 absolute value would just be 4
anonymous
  • anonymous
i got x = -3, x= -11
welshfella
  • welshfella
there are 2 answers they are the solutions of x + 7 = 4 and x + 7 = -4
welshfella
  • welshfella
i'm sure you can solve these 2 simple equations ?
anonymous
  • anonymous
i got that answer that i posted above
anonymous
  • anonymous
i got -3 for the first equation and -11 for the second
welshfella
  • welshfella
right

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