13r plus 10 equals 5r-46

Answer 1

3r+10=5r-46 --> add 46 to both sides

3r+10+46=5r-46+46

3r+56=5r --> subtract 3r from both sides

3r+56-3r=5r-3r

56=2r --> divide both sides by 2

56/2=2r/2

28=r