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2 votes
12-9+c=12 what value of c makes the equation true​

2 Answers

5 votes

Hello!

Answer:


\boxed{C=9}

*The answer must have a POSITIVE sign!*

Explanation:

First, you subtract by 12 from both sides of an equation.


12-9+c-12=12-12

Simplify by equation.


-9+c=0

Then, you add by 9 from both sides of an equation.


-9+c+9=0+9

Add by the numbers from left to right.


0+9=9


\boxed{C=9}, which is our final answer.

Hope this helps!

Thanks!

-Charlie

Have a great day! :)

:D

User Fofik
by
5.5k points
4 votes

Hey there!


  • \bold{12-9+c=12}
  • Firstly, subtract by
    \bold{12} on each of your sides

  • \bold{12-9+c-12=12-12}

  • \bold{Cancel:12-12} because it gives you the result of
    \bold{Keep:12-9+c-12} because it helps us solve for the value of
    \bold{0}

  • \bold{-9+c=0}
  • Now, we have to subtract by the number
    \bold{9}

  • \bold{-9+c+9=0+9}

  • \bold{Cancel:-9+9} because it gives you the result of
    \bold{0}

  • \bold{Keep:0+9} because us the value of
    \bold{c}

  • \boxed{\boxed{\bold{Answer:c=9}}}\checkmark

Good luck on your assignment and enjoy your day!

~
\bold{LoveYourselfFirst:)}

User HieroB
by
4.6k points