Respuesta :

well u need c to be alone so u subtract 2.4 from -40  so c= -42.1
It's not absolutely necessary to get rid of that decimal fraction, but you might find the solution more easily if you do this.  Multiply all 3 terms by 10.

Next, subtract 24 from both sides of the resulting equation.  If you've done this correctly, you'll have an equation for c, which is the answer you wanted.
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