Question

P = a + b + c; solve for b

Answer 1

b = P - a - c

Explanation:

Step 1: Write equation

P = a + b + c

Step 2: Solve for b

1. Subtract a on both sides: P - a = b + c
2. Subtract c on both sides: P - a - c = b
3. Rewrite: b = P - a - c