Rewrite the equation as .

Multiply both sides of the equation by .

Multiply by .

Divide each term in by .

Simplify the left side of the equation by cancelling the common factors.

Cancel the common factor of .

Cancel the common factor.

Rewrite the expression.

Cancel the common factor of .

Cancel the common factor.

Divide by .

Solve for G F=(GMm)/(r^2)