Question

Ria solves the equation 5 + 3r = 4 + 4r and gets r = r. She concludes that the equation has infinitely many solutions. What is the correct solution? What mistake did Ria make?​

Answer 1

5 + 3r = 4 + 4r

5 - 4 = 4r - 3r

1 = r

The correct answer is r = 1.