4C + 16 =-8

Question

need to model

 

Answer 1

The goal is to get C by itself, as in C = something.  This is often done by isolating expression and doing the reverse operation on them on both side.  So:

 

  4C + 16 = -8

 

Need to get C by itself, 16 has nothing to do with C so let's get rid of it by subtracting it from both sides:

 

  4C + 16 = -8

       - 16      -16

 

hence:

 

  4C = -8 - 16

  4C = -24

 

Now all that's left is an expression involving C, but we can still isolate C by doing the inverse operation.  So the expression involve C is 4*C which is 4 multiplied by C, then let's divide by 4, and do so to both sides:

 

  4C = -24

  --      ---

  4       4

 

cancel out and it becomes:

 

  C = -6

 

feed -6 back into the original equation to double check:

 

  4(-6) + 16 = -8

  -24 + 16 = -8

  -8 = -8

 

Yup!