you have a total of 55 seats and there are six rows of seats. It says that each row has three less than the first. Now if youΒ are making an equation for this you would say your previous number x -3 your previous number would of course would be 55, And you would subtract 3 from that and you would do this six times.
Β
55-3=52
52-3=49
49-3=46
46-3=43
43-3=40
40-3=37