Given the formula a=b+c, rewrite the formula to solve for b.

a=b+c

This type of problem can be done in multiple ways.

Start by subtracting b from both sides

a-b=b-b+c

Now we have:

a-b=c

Subtract a from both sides:

a-a-b=c-a

Now we have:

-b=-a+c

Divide both sides by - 1 (because we have - 1b)

Final answer:

b = a-c