Again, we're going to be following the same format we did last time, but the sides of the equation have been swapped. Let's not worry about this, as it doesn't exactly make a difference.
Since 1 is negative, we must add it on both sides.
<em>8 + 1 = 3r - 1 + 1 </em> <em>9 = 3r </em> <em />Now, we have 3 which is multiplying our variable r. The inverse of multiplication is division, so we will divide both sides by 3. This will leave us with our answer.
<em>9 / 3 = 3r / 3 </em> <em>3 = r </em>or <em>r = 3. </em> Hopefully, this helps.
