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
subtract 4 from both sides
1+3r=4r
subtract 3r from both sides
1=r