Question

Make r the subject of P=r+2r+2a

Answer 1

`r=(P)/(3) -(2a)/(3)`

Explanation:

Simplify by combining like terms.

P=3r+2a

Subtract 2a from both sides.

P-2a=3r.

Flip the equation.

3r=P-2a

Divide both sides by 3.

`r=(P)/(3) -(2a)/(3)`