Question

Make b the subject of the formula p=2a+2b

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Answer 1

b = (p -2a)/2

Explanation:

You want b the subject of the relation p=2a+2b.

Solution

Solve this the way you would solve any 2-step linear equation.

p = 2a +2b . . . . . . given

p -2a = 2b . . . . . . . subtract the term not containing b

(p -2a)/2 = b . . . . . . divide by the coefficient of the variable

Your formula is ...

b = (p -2a)/2

or

b = (p/2) -a