Simplify the expression where possible. (r 3) - 2

What you do to on side of an equation (=) you must do to the other to keep both sides equal.

r3-2+2=+2 (add 2 to both sides of the equation to simplify the left side)

which becomes

r3=2

r3/3 = 2/3 (divide both sides by 3) Note 3/3 = 1 and 1 r is the same as r

which becomes

r=2/3.