Question

P=a+b+c solve for c

Answer 1

c=P-a-b

Explanation:

P=a+b+c

P=(a+b)+c

To get c by itself just subtract (a+b) on both sides:

P-(a+b)=c

You may distribute here if you like and write:

P-a-b=c

So by symmetric property of equality we have:

c=P-a-b